87500979 has 10 divisors (see below), whose sum is σ = 130711460. Its totient is φ = 58333932.

The previous prime is 87500977. The next prime is 87500983. The reversal of 87500979 is 97900578.

It is not a de Polignac number, because 87500979 - 2¹ = 87500977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87500971) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 540049 + ... + 540210.

It is an arithmetic number, because the mean of its divisors is an integer number (13071146).

Almost surely, 2^87500979 is an apocalyptic number.

87500979 is a deficient number, since it is larger than the sum of its proper divisors (43210481).

87500979 is a wasteful number, since it uses less digits than its factorization.

87500979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1080271 (or 1080262 counting only the distinct ones).

The product of its (nonzero) digits is 158760, while the sum is 45.

The square root of 87500979 is about 9354.1957965396. The cubic root of 87500979 is about 443.9536565947.

The spelling of 87500979 in words is "eighty-seven million, five hundred thousand, nine hundred seventy-nine".