79290087 has 4 divisors (see below), whose sum is σ = 105720120. Its totient is φ = 52860056.

The previous prime is 79290077. The next prime is 79290109. The reversal of 79290087 is 78009297.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-79290087 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79290007) 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, 13215012 + ... + 13215017.

It is an arithmetic number, because the mean of its divisors is an integer number (26430030).

Almost surely, 2^79290087 is an apocalyptic number.

79290087 is a deficient number, since it is larger than the sum of its proper divisors (26430033).

79290087 is a wasteful number, since it uses less digits than its factorization.

79290087 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26430032.

The product of its (nonzero) digits is 63504, while the sum is 42.

The square root of 79290087 is about 8904.4981329663. The cubic root of 79290087 is about 429.6085982296.

The spelling of 79290087 in words is "seventy-nine million, two hundred ninety thousand, eighty-seven".