791979913 has 2 divisors, whose sum is σ = 791979914. Its totient is φ = 791979912.

The previous prime is 791979899. The next prime is 791979917. The reversal of 791979913 is 319979197.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 628855929 + 163123984 = 25077^2 + 12772^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-791979913 is a prime.

It is not a weakly prime, because it can be changed into another prime (791979917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 395989956 + 395989957.

It is an arithmetic number, because the mean of its divisors is an integer number (395989957).

Almost surely, 2^791979913 is an apocalyptic number.

It is an amenable number.

791979913 is a deficient number, since it is larger than the sum of its proper divisors (1).

791979913 is an equidigital number, since it uses as much as digits as its factorization.

791979913 is an evil number, because the sum of its binary digits is even.

The product of its digits is 964467, while the sum is 55.

The square root of 791979913 is about 28142.1376764453. The cubic root of 791979913 is about 925.2051799044.

The spelling of 791979913 in words is "seven hundred ninety-one million, nine hundred seventy-nine thousand, nine hundred thirteen".