79670431 has 4 divisors (see below), whose sum is σ = 79691872. Its totient is φ = 79648992.

The previous prime is 79670407. The next prime is 79670447. The reversal of 79670431 is 13407697.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13407697 = 41 ⋅327017.

It is a cyclic number.

It is not a de Polignac number, because 79670431 - 2⁵ = 79670399 is a prime.

It is a super-2 number, since 2×79670431² = 12694755151451522, 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 (79670471) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3546 + ... + 13111.

It is an arithmetic number, because the mean of its divisors is an integer number (19922968).

Almost surely, 2^79670431 is an apocalyptic number.

79670431 is a deficient number, since it is larger than the sum of its proper divisors (21441).

79670431 is a wasteful number, since it uses less digits than its factorization.

79670431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21440.

The product of its (nonzero) digits is 31752, while the sum is 37.

The square root of 79670431 is about 8925.8294292463. The cubic root of 79670431 is about 430.2944278840.

The spelling of 79670431 in words is "seventy-nine million, six hundred seventy thousand, four hundred thirty-one".