87842101 has 4 divisors (see below), whose sum is σ = 87957100. Its totient is φ = 87727104.

The previous prime is 87842081. The next prime is 87842113. The reversal of 87842101 is 10124878.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 54375876 + 33466225 = 7374^2 + 5785^2 .

It is a cyclic number.

It is not a de Polignac number, because 87842101 - 2²⁵ = 54287669 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87842171) 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, 56346 + ... + 57883.

It is an arithmetic number, because the mean of its divisors is an integer number (21989275).

Almost surely, 2^87842101 is an apocalyptic number.

It is an amenable number.

87842101 is a deficient number, since it is larger than the sum of its proper divisors (114999).

87842101 is a wasteful number, since it uses less digits than its factorization.

87842101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114998.

The product of its (nonzero) digits is 3584, while the sum is 31.

The square root of 87842101 is about 9372.4116960364. The cubic root of 87842101 is about 444.5298253305.

Adding to 87842101 its reverse (10124878), we get a palindrome (97966979).

The spelling of 87842101 in words is "eighty-seven million, eight hundred forty-two thousand, one hundred one".