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87367791 = 374160371
BaseRepresentation
bin1010011010100…
…10000001101111
320002101202002010
411031102001233
5134331232131
612400332303
72110420410
oct515220157
9202352063
1087367791
1145353795
1225314093
131513cb24
14b863807
157a0bb46
hex535206f

87367791 has 8 divisors (see below), whose sum is σ = 133131904. Its totient is φ = 49924440.

The previous prime is 87367741. The next prime is 87367801. The reversal of 87367791 is 19776378.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 87367791 - 213 = 87359599 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 87367791.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87367711) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2080165 + ... + 2080206.

It is an arithmetic number, because the mean of its divisors is an integer number (16641488).

Almost surely, 287367791 is an apocalyptic number.

87367791 is a deficient number, since it is larger than the sum of its proper divisors (45764113).

87367791 is a wasteful number, since it uses less digits than its factorization.

87367791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4160381.

The product of its digits is 444528, while the sum is 48.

The square root of 87367791 is about 9347.0739271710. The cubic root of 87367791 is about 443.7282902558.

The spelling of 87367791 in words is "eighty-seven million, three hundred sixty-seven thousand, seven hundred ninety-one".

Divisors: 1 3 7 21 4160371 12481113 29122597 87367791