87056397 has 16 divisors (see below), whose sum is σ = 129288960. Its totient is φ = 57895200.

The previous prime is 87056393. The next prime is 87056399. The reversal of 87056397 is 79365078.

It is a happy number.

87056397 is a `hidden beast` number, since 8 + 7 + 0 + 5 + 639 + 7 = 666.

It is not a de Polignac number, because 87056397 - 2² = 87056393 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87056393) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7897 + ... + 15377.

It is an arithmetic number, because the mean of its divisors is an integer number (8080560).

Almost surely, 2^87056397 is an apocalyptic number.

It is an amenable number.

87056397 is a deficient number, since it is larger than the sum of its proper divisors (42232563).

87056397 is a wasteful number, since it uses less digits than its factorization.

87056397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7921 (or 7915 counting only the distinct ones).

The product of its (nonzero) digits is 317520, while the sum is 45.

The square root of 87056397 is about 9330.4017598386. The cubic root of 87056397 is about 443.2004877686.

The spelling of 87056397 in words is "eighty-seven million, fifty-six thousand, three hundred ninety-seven".