87056979 has 4 divisors (see below), whose sum is σ = 116075976. Its totient is φ = 58037984.

The previous prime is 87056969. The next prime is 87056987. The reversal of 87056979 is 97965078.

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

It is a cyclic number.

It is not a de Polignac number, because 87056979 - 2¹⁵ = 87024211 is a prime.

It is not an unprimeable number, because it can be changed into a prime (87056929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14509494 + ... + 14509499.

It is an arithmetic number, because the mean of its divisors is an integer number (29018994).

Almost surely, 2^87056979 is an apocalyptic number.

87056979 is a deficient number, since it is larger than the sum of its proper divisors (29018997).

87056979 is a wasteful number, since it uses less digits than its factorization.

87056979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29018996.

The product of its (nonzero) digits is 952560, while the sum is 51.

The square root of 87056979 is about 9330.4329481541. The cubic root of 87056979 is about 443.2014754124.

The spelling of 87056979 in words is "eighty-seven million, fifty-six thousand, nine hundred seventy-nine".