79317013 has 2 divisors, whose sum is σ = 79317014. Its totient is φ = 79317012.

The previous prime is 79316999. The next prime is 79317031. The reversal of 79317013 is 31071397.

79317013 = 6297² + 6298².

Together with next prime (79317031) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39664804 + 39652209 = 6298^2 + 6297^2 .

It is a cyclic number.

It is not a de Polignac number, because 79317013 - 2⁵ = 79316981 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (79317113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39658506 + 39658507.

It is an arithmetic number, because the mean of its divisors is an integer number (39658507).

Almost surely, 2^79317013 is an apocalyptic number.

79317013 is the 6298-th centered square number.

It is an amenable number.

79317013 is a deficient number, since it is larger than the sum of its proper divisors (1).

79317013 is an equidigital number, since it uses as much as digits as its factorization.

79317013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3969, while the sum is 31.

The square root of 79317013 is about 8906.0099371155. The cubic root of 79317013 is about 429.6572227693.

The spelling of 79317013 in words is "seventy-nine million, three hundred seventeen thousand, thirteen".