79972031 has 4 divisors (see below), whose sum is σ = 79998072. Its totient is φ = 79945992.

The previous prime is 79972003. The next prime is 79972043. The reversal of 79972031 is 13027997.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 79972031 - 2⁶ = 79971967 is a prime.

It is a super-2 number, since 2×79972031² = 12791051484529922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79972001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7685 + ... + 14798.

It is an arithmetic number, because the mean of its divisors is an integer number (19999518).

Almost surely, 2^79972031 is an apocalyptic number.

79972031 is a deficient number, since it is larger than the sum of its proper divisors (26041).

79972031 is a wasteful number, since it uses less digits than its factorization.

79972031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26040.

The product of its (nonzero) digits is 23814, while the sum is 38.

The square root of 79972031 is about 8942.7082586876. The cubic root of 79972031 is about 430.8367176668.

The spelling of 79972031 in words is "seventy-nine million, nine hundred seventy-two thousand, thirty-one".