79517855 has 8 divisors (see below), whose sum is σ = 98712000. Its totient is φ = 61420576.

The previous prime is 79517827. The next prime is 79517863. The reversal of 79517855 is 55871597.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 79517855 - 2¹⁰ = 79516831 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 274055 + ... + 274344.

It is an arithmetic number, because the mean of its divisors is an integer number (12339000).

Almost surely, 2^79517855 is an apocalyptic number.

79517855 is a deficient number, since it is larger than the sum of its proper divisors (19194145).

79517855 is a wasteful number, since it uses less digits than its factorization.

79517855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 548433.

The product of its digits is 441000, while the sum is 47.

The square root of 79517855 is about 8917.2784525325. The cubic root of 79517855 is about 430.0195682460.

The spelling of 79517855 in words is "seventy-nine million, five hundred seventeen thousand, eight hundred fifty-five".