79831431 has 12 divisors (see below), whose sum is σ = 115511760. Its totient is φ = 53128800.

The previous prime is 79831429. The next prime is 79831441. The reversal of 79831431 is 13413897.

It is a happy number.

It is not a de Polignac number, because 79831431 - 2¹ = 79831429 is a prime.

It is a super-2 number, since 2×79831431² = 12746114751015522, which contains 22 as substring.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79831421) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1971 + ... + 12788.

It is an arithmetic number, because the mean of its divisors is an integer number (9625980).

Almost surely, 2^79831431 is an apocalyptic number.

79831431 is a deficient number, since it is larger than the sum of its proper divisors (35680329).

79831431 is a wasteful number, since it uses less digits than its factorization.

79831431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15366 (or 15363 counting only the distinct ones).

The product of its digits is 18144, while the sum is 36.

The square root of 79831431 is about 8934.8436472050. The cubic root of 79831431 is about 430.5840827723.

The spelling of 79831431 in words is "seventy-nine million, eight hundred thirty-one thousand, four hundred thirty-one".