79902587 has 4 divisors (see below), whose sum is σ = 80221176. Its totient is φ = 79584000.

The previous prime is 79902553. The next prime is 79902607. The reversal of 79902587 is 78520997.

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 79902587 - 2¹⁸ = 79640443 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (79902287) 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, 158918 + ... + 159419.

It is an arithmetic number, because the mean of its divisors is an integer number (20055294).

Almost surely, 2^79902587 is an apocalyptic number.

79902587 is a deficient number, since it is larger than the sum of its proper divisors (318589).

79902587 is a wasteful number, since it uses less digits than its factorization.

79902587 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 318588.

The product of its (nonzero) digits is 317520, while the sum is 47.

The square root of 79902587 is about 8938.8246990306. The cubic root of 79902587 is about 430.7119753499.

The spelling of 79902587 in words is "seventy-nine million, nine hundred two thousand, five hundred eighty-seven".