79839812 has 12 divisors (see below), whose sum is σ = 150467436. Its totient is φ = 36849120.

The previous prime is 79839763. The next prime is 79839817. The reversal of 79839812 is 21893897.

It can be written as a sum of positive squares in 2 ways, for example, as 4393216 + 75446596 = 2096^2 + 8686^2 .

It is not an unprimeable number, because it can be changed into a prime (79839817) 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, 767639 + ... + 767742.

It is an arithmetic number, because the mean of its divisors is an integer number (12538953).

Almost surely, 2^79839812 is an apocalyptic number.

It is an amenable number.

79839812 is a deficient number, since it is larger than the sum of its proper divisors (70627624).

79839812 is a wasteful number, since it uses less digits than its factorization.

79839812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1535398 (or 1535396 counting only the distinct ones).

The product of its digits is 217728, while the sum is 47.

The square root of 79839812 is about 8935.3126414245. The cubic root of 79839812 is about 430.5991503502.

The spelling of 79839812 in words is "seventy-nine million, eight hundred thirty-nine thousand, eight hundred twelve".