79431 has 16 divisors (see below), whose sum is σ = 120960. Its totient is φ = 45920.

The previous prime is 79427. The next prime is 79433. The reversal of 79431 is 13497.

It is a cyclic number.

It is not a de Polignac number, because 79431 - 2² = 79427 is a prime.

It is a super-2 number, since 2×79431² = 12618567522, which contains 22 as substring.

Its product of digits (756) is a multiple of the sum of its prime divisors (126).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79433) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 916 + ... + 998.

It is an arithmetic number, because the mean of its divisors is an integer number (7560).

2⁷⁹⁴³¹ is an apocalyptic number.

79431 is a deficient number, since it is larger than the sum of its proper divisors (41529).

79431 is a wasteful number, since it uses less digits than its factorization.

79431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126.

The product of its digits is 756, while the sum is 24.

The square root of 79431 is about 281.8350581457. The cubic root of 79431 is about 42.9862945324.

The spelling of 79431 in words is "seventy-nine thousand, four hundred thirty-one".