79217679 has 8 divisors (see below), whose sum is σ = 109030912. Its totient is φ = 51108120.

The previous prime is 79217659. The next prime is 79217683. The reversal of 79217679 is 97671297.

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

It is not a de Polignac number, because 79217679 - 2²³ = 70829071 is a prime.

It is a super-2 number, since 2×79217679² = 12550881332294082, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79217659) 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, 425809 + ... + 425994.

It is an arithmetic number, because the mean of its divisors is an integer number (13628864).

Almost surely, 2^79217679 is an apocalyptic number.

79217679 is a deficient number, since it is larger than the sum of its proper divisors (29813233).

79217679 is a wasteful number, since it uses less digits than its factorization.

79217679 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 851837.

The product of its digits is 333396, while the sum is 48.

The square root of 79217679 is about 8900.4313940393. The cubic root of 79217679 is about 429.4777850162.

The spelling of 79217679 in words is "seventy-nine million, two hundred seventeen thousand, six hundred seventy-nine".