79966731 has 32 divisors (see below), whose sum is σ = 119031808. Its totient is φ = 47433600.

The previous prime is 79966721. The next prime is 79966739. The reversal of 79966731 is 13766997.

It is not a de Polignac number, because 79966731 - 2¹⁰ = 79965707 is a prime.

It is a super-2 number, since 2×79966731² = 12789356133652722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (79966739) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 217710 + ... + 218076.

It is an arithmetic number, because the mean of its divisors is an integer number (3719744).

Almost surely, 2^79966731 is an apocalyptic number.

79966731 is a deficient number, since it is larger than the sum of its proper divisors (39065077).

79966731 is a wasteful number, since it uses less digits than its factorization.

79966731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 571.

The product of its digits is 428652, while the sum is 48.

The square root of 79966731 is about 8942.4119229657. The cubic root of 79966731 is about 430.8271998182.

The spelling of 79966731 in words is "seventy-nine million, nine hundred sixty-six thousand, seven hundred thirty-one".