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987842101 = 7211136991
BaseRepresentation
bin111010111000010…
…100011000110101
32112211210120121111
4322320110120311
54010341421401
6242004515021
733323343061
oct7270243065
92484716544
10987842101
1146767a434
122369aba71
1312987136c
14952a4aa1
155bacde51
hex3ae14635

987842101 has 4 divisors (see below), whose sum is σ = 987986304. Its totient is φ = 987697900.

The previous prime is 987842077. The next prime is 987842123. The reversal of 987842101 is 101248789.

It is a happy number.

987842101 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 101248789 = 432354623.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-987842101 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a deceptive number, since it divides R987842100.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (987842161) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 61285 + ... + 75706.

It is an arithmetic number, because the mean of its divisors is an integer number (246996576).

It is a Poulet number, since it divides 2987842100-1.

Almost surely, 2987842101 is an apocalyptic number.

It is an amenable number.

987842101 is a deficient number, since it is larger than the sum of its proper divisors (144203).

987842101 is a wasteful number, since it uses less digits than its factorization.

987842101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144202.

The product of its (nonzero) digits is 32256, while the sum is 40.

The square root of 987842101 is about 31429.9554724470. The cubic root of 987842101 is about 995.9308313256.

The spelling of 987842101 in words is "nine hundred eighty-seven million, eight hundred forty-two thousand, one hundred one".

Divisors: 1 7211 136991 987842101