79983731 has 4 divisors (see below), whose sum is σ = 81492912. Its totient is φ = 78474552.

The previous prime is 79983637. The next prime is 79983737. The reversal of 79983731 is 13738997.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13738997 = 71 ⋅193507.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-79983731 is a prime.

It is a super-2 number, since 2×79983731² = 12794794449360722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (79983737) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 754511 + ... + 754616.

It is an arithmetic number, because the mean of its divisors is an integer number (20373228).

Almost surely, 2^79983731 is an apocalyptic number.

79983731 is a deficient number, since it is larger than the sum of its proper divisors (1509181).

79983731 is a wasteful number, since it uses less digits than its factorization.

79983731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1509180.

The product of its digits is 285768, while the sum is 47.

The square root of 79983731 is about 8943.3623990086. The cubic root of 79983731 is about 430.8577272779.

The spelling of 79983731 in words is "seventy-nine million, nine hundred eighty-three thousand, seven hundred thirty-one".