79431861 has 8 divisors (see below), whose sum is σ = 105963040. Its totient is φ = 52927632.

The previous prime is 79431851. The next prime is 79431887. The reversal of 79431861 is 16813497.

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

It is not a de Polignac number, because 79431861 - 2⁵ = 79431829 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79431851) 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, 1626 + ... + 12708.

It is an arithmetic number, because the mean of its divisors is an integer number (13245380).

Almost surely, 2^79431861 is an apocalyptic number.

It is an amenable number.

79431861 is a deficient number, since it is larger than the sum of its proper divisors (26531179).

79431861 is a wasteful number, since it uses less digits than its factorization.

79431861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13475.

The product of its digits is 36288, while the sum is 39.

The square root of 79431861 is about 8912.4553855826. The cubic root of 79431861 is about 429.8644984987.

The spelling of 79431861 in words is "seventy-nine million, four hundred thirty-one thousand, eight hundred sixty-one".