79137913 has 16 divisors (see below), whose sum is σ = 83207376. Its totient is φ = 75202560.

The previous prime is 79137899. The next prime is 79137943. The reversal of 79137913 is 31973197.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 8779369 + 70358544 = 2963^2 + 8388^2 .

It is a cyclic number.

It is not a de Polignac number, because 79137913 - 2⁵ = 79137881 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (79137943) by changing a digit.

It is an upside-down number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 409945 + ... + 410137.

It is an arithmetic number, because the mean of its divisors is an integer number (5200461).

Almost surely, 2^79137913 is an apocalyptic number.

79137913 is a gapful number since it is divisible by the number (73) formed by its first and last digit.

It is an amenable number.

79137913 is a deficient number, since it is larger than the sum of its proper divisors (4069463).

79137913 is a wasteful number, since it uses less digits than its factorization.

79137913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 444.

The product of its digits is 35721, while the sum is 40.

The square root of 79137913 is about 8895.9492467077. The cubic root of 79137913 is about 429.3335864393. Note that the first 3 decimals are identical.

The spelling of 79137913 in words is "seventy-nine million, one hundred thirty-seven thousand, nine hundred thirteen".