79792813 has 2 divisors, whose sum is σ = 79792814. Its totient is φ = 79792812.

The previous prime is 79792787. The next prime is 79792859. The reversal of 79792813 is 31829797.

It is a happy number.

It is an a-pointer prime, because the next prime (79792859) can be obtained adding 79792813 to its sum of digits (46).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 53187849 + 26604964 = 7293^2 + 5158^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-79792813 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (79792873) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39896406 + 39896407.

It is an arithmetic number, because the mean of its divisors is an integer number (39896407).

Almost surely, 2^79792813 is an apocalyptic number.

It is an amenable number.

79792813 is a deficient number, since it is larger than the sum of its proper divisors (1).

79792813 is an equidigital number, since it uses as much as digits as its factorization.

79792813 is an evil number, because the sum of its binary digits is even.

The product of its digits is 190512, while the sum is 46.

The square root of 79792813 is about 8932.6822959288. The cubic root of 79792813 is about 430.5146407079.

The spelling of 79792813 in words is "seventy-nine million, seven hundred ninety-two thousand, eight hundred thirteen".