79925865 has 8 divisors (see below), whose sum is σ = 127881408. Its totient is φ = 42627120.

The previous prime is 79925849. The next prime is 79925869. The reversal of 79925865 is 56852997.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 79925865 - 2⁴ = 79925849 is a prime.

It is not an unprimeable number, because it can be changed into a prime (79925869) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2664181 + ... + 2664210.

It is an arithmetic number, because the mean of its divisors is an integer number (15985176).

Almost surely, 2^79925865 is an apocalyptic number.

It is an amenable number.

79925865 is a deficient number, since it is larger than the sum of its proper divisors (47955543).

79925865 is a wasteful number, since it uses less digits than its factorization.

79925865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5328399.

The product of its digits is 1360800, while the sum is 51.

The square root of 79925865 is about 8940.1266769549. The cubic root of 79925865 is about 430.7537976916.

The spelling of 79925865 in words is "seventy-nine million, nine hundred twenty-five thousand, eight hundred sixty-five".