791388613 has 2 divisors, whose sum is σ = 791388614. Its totient is φ = 791388612.

The previous prime is 791388571. The next prime is 791388629. The reversal of 791388613 is 316883197.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 695798884 + 95589729 = 26378^2 + 9777^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-791388613 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (791388413) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 395694306 + 395694307.

It is an arithmetic number, because the mean of its divisors is an integer number (395694307).

Almost surely, 2^791388613 is an apocalyptic number.

It is an amenable number.

791388613 is a deficient number, since it is larger than the sum of its proper divisors (1).

791388613 is an equidigital number, since it uses as much as digits as its factorization.

791388613 is an evil number, because the sum of its binary digits is even.

The product of its digits is 217728, while the sum is 46.

The square root of 791388613 is about 28131.6301162944. The cubic root of 791388613 is about 924.9748668116.

The spelling of 791388613 in words is "seven hundred ninety-one million, three hundred eighty-eight thousand, six hundred thirteen".