79731970 has 16 divisors (see below), whose sum is σ = 144322560. Its totient is φ = 31713904.

The previous prime is 79731959. The next prime is 79731973. The reversal of 79731970 is 7913797.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (79731973) 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, 20482 + ... + 24061.

It is an arithmetic number, because the mean of its divisors is an integer number (9020160).

Almost surely, 2^79731970 is an apocalyptic number.

79731970 is a deficient number, since it is larger than the sum of its proper divisors (64590590).

79731970 is a wasteful number, since it uses less digits than its factorization.

79731970 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44729.

The product of its (nonzero) digits is 83349, while the sum is 43.

The square root of 79731970 is about 8929.2760064856. The cubic root of 79731970 is about 430.4051886498.

The spelling of 79731970 in words is "seventy-nine million, seven hundred thirty-one thousand, nine hundred seventy".