79813985 has 8 divisors (see below), whose sum is σ = 95893440. Its totient is φ = 63773424.

The previous prime is 79813973. The next prime is 79813999. The reversal of 79813985 is 58931897.

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 79813985 - 2²² = 75619681 is a prime.

It is a super-3 number, since 3×79813985³ (a number of 25 digits) contains 333 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4997 + ... + 13586.

It is an arithmetic number, because the mean of its divisors is an integer number (11986680).

Almost surely, 2^79813985 is an apocalyptic number.

It is an amenable number.

79813985 is a deficient number, since it is larger than the sum of its proper divisors (16079455).

79813985 is a wasteful number, since it uses less digits than its factorization.

79813985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19447.

The product of its digits is 544320, while the sum is 50.

The square root of 79813985 is about 8933.8673036933. The cubic root of 79813985 is about 430.5527145209.

The spelling of 79813985 in words is "seventy-nine million, eight hundred thirteen thousand, nine hundred eighty-five".