79831970 has 16 divisors (see below), whose sum is σ = 145180728. Its totient is φ = 31603200.

The previous prime is 79831963. The next prime is 79831979. The reversal of 79831970 is 7913897.

It can be written as a sum of positive squares in 4 ways, for example, as 67881121 + 11950849 = 8239^2 + 3457^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (79831979) 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, 40181 + ... + 42120.

Almost surely, 2^79831970 is an apocalyptic number.

79831970 is a deficient number, since it is larger than the sum of its proper divisors (65348758).

79831970 is a wasteful number, since it uses less digits than its factorization.

79831970 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82405.

The product of its (nonzero) digits is 95256, while the sum is 44.

The square root of 79831970 is about 8934.8738099651. The cubic root of 79831970 is about 430.5850518321.

It can be divided in two parts, 798 and 31970, that added together give a 15-th power (32768 = 2¹⁵).

The spelling of 79831970 in words is "seventy-nine million, eight hundred thirty-one thousand, nine hundred seventy".