79618313 has 2 divisors, whose sum is σ = 79618314. Its totient is φ = 79618312.

The previous prime is 79618283. The next prime is 79618321. The reversal of 79618313 is 31381697.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 69172489 + 10445824 = 8317^2 + 3232^2 .

It is an emirp because it is prime and its reverse (31381697) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 79618313 - 2¹⁶ = 79552777 is a prime.

It is equal to p_4648439 and since 79618313 and 4648439 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (79618373) 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, 39809156 + 39809157.

It is an arithmetic number, because the mean of its divisors is an integer number (39809157).

Almost surely, 2^79618313 is an apocalyptic number.

It is an amenable number.

79618313 is a deficient number, since it is larger than the sum of its proper divisors (1).

79618313 is an equidigital number, since it uses as much as digits as its factorization.

79618313 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 27216, while the sum is 38.

The square root of 79618313 is about 8922.9094470358. The cubic root of 79618313 is about 430.2005788585.

The spelling of 79618313 in words is "seventy-nine million, six hundred eighteen thousand, three hundred thirteen".