87102979 has 4 divisors (see below), whose sum is σ = 90106560. Its totient is φ = 84099400.

The previous prime is 87102949. The next prime is 87102989. The reversal of 87102979 is 97920178.

It is a happy number.

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 87102979 - 2²³ = 78714371 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87102919) 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, 1501747 + ... + 1501804.

It is an arithmetic number, because the mean of its divisors is an integer number (22526640).

Almost surely, 2^87102979 is an apocalyptic number.

87102979 is a deficient number, since it is larger than the sum of its proper divisors (3003581).

87102979 is a wasteful number, since it uses less digits than its factorization.

87102979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3003580.

The product of its (nonzero) digits is 63504, while the sum is 43.

The square root of 87102979 is about 9332.8976743560. The cubic root of 87102979 is about 443.2795226804.

The spelling of 87102979 in words is "eighty-seven million, one hundred two thousand, nine hundred seventy-nine".