79285865 has 4 divisors (see below), whose sum is σ = 95143044. Its totient is φ = 63428688.

The previous prime is 79285847. The next prime is 79285891. The reversal of 79285865 is 56858297.

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

It can be written as a sum of positive squares in 2 ways, for example, as 44049769 + 35236096 = 6637^2 + 5936^2 .

It is a cyclic number.

It is not a de Polignac number, because 79285865 - 2²⁶ = 12177001 is a prime.

It is a super-3 number, since 3×79285865³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7928582 + ... + 7928591.

It is an arithmetic number, because the mean of its divisors is an integer number (23785761).

Almost surely, 2^79285865 is an apocalyptic number.

It is an amenable number.

79285865 is a deficient number, since it is larger than the sum of its proper divisors (15857179).

79285865 is a wasteful number, since it uses less digits than its factorization.

79285865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15857178.

The product of its digits is 1209600, while the sum is 50.

The square root of 79285865 is about 8904.2610586168. The cubic root of 79285865 is about 429.6009728977.

The spelling of 79285865 in words is "seventy-nine million, two hundred eighty-five thousand, eight hundred sixty-five".