79131908 has 6 divisors (see below), whose sum is σ = 138480846. Its totient is φ = 39565952.

The previous prime is 79131907. The next prime is 79131917. The reversal of 79131908 is 80913197.

It can be written as a sum of positive squares in only one way, i.e., 75203584 + 3928324 = 8672^2 + 1982^2 .

It is not an unprimeable number, because it can be changed into a prime (79131901) 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 as a sum of consecutive naturals, namely, 9891485 + ... + 9891492.

It is an arithmetic number, because the mean of its divisors is an integer number (23080141).

Almost surely, 2^79131908 is an apocalyptic number.

It is an amenable number.

79131908 is a deficient number, since it is larger than the sum of its proper divisors (59348938).

79131908 is a wasteful number, since it uses less digits than its factorization.

79131908 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19782981 (or 19782979 counting only the distinct ones).

The product of its (nonzero) digits is 13608, while the sum is 38.

The square root of 79131908 is about 8895.6117271383. The cubic root of 79131908 is about 429.3227268597.

The spelling of 79131908 in words is "seventy-nine million, one hundred thirty-one thousand, nine hundred eight".