79700813 has 2 divisors, whose sum is σ = 79700814. Its totient is φ = 79700812.

The previous prime is 79700791. The next prime is 79700827. The reversal of 79700813 is 31800797.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 71961289 + 7739524 = 8483^2 + 2782^2 .

It is a cyclic number.

It is not a de Polignac number, because 79700813 - 2⁶ = 79700749 is a prime.

It is a Chen prime.

79700813 is a modest number, since divided by 813 gives 797 as remainder.

It is equal to p_4652981 and since 79700813 and 4652981 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (79700713) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39850406 + 39850407.

It is an arithmetic number, because the mean of its divisors is an integer number (39850407).

Almost surely, 2^79700813 is an apocalyptic number.

It is an amenable number.

79700813 is a deficient number, since it is larger than the sum of its proper divisors (1).

79700813 is an equidigital number, since it uses as much as digits as its factorization.

79700813 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10584, while the sum is 35.

The square root of 79700813 is about 8927.5311816874. The cubic root of 79700813 is about 430.3491179519.

The spelling of 79700813 in words is "seventy-nine million, seven hundred thousand, eight hundred thirteen".