79733813 has 2 divisors, whose sum is σ = 79733814. Its totient is φ = 79733812.

The previous prime is 79733809. The next prime is 79733821. The reversal of 79733813 is 31833797.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 73393489 + 6340324 = 8567^2 + 2518^2 .

It is a cyclic number.

It is not a de Polignac number, because 79733813 - 2² = 79733809 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (79733513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39866906 + 39866907.

It is an arithmetic number, because the mean of its divisors is an integer number (39866907).

Almost surely, 2^79733813 is an apocalyptic number.

It is an amenable number.

79733813 is a deficient number, since it is larger than the sum of its proper divisors (1).

79733813 is an equidigital number, since it uses as much as digits as its factorization.

79733813 is an evil number, because the sum of its binary digits is even.

The product of its digits is 95256, while the sum is 41.

The square root of 79733813 is about 8929.3792057455. The cubic root of 79733813 is about 430.4085048882.

The spelling of 79733813 in words is "seventy-nine million, seven hundred thirty-three thousand, eight hundred thirteen".