796640891 has 2 divisors, whose sum is σ = 796640892. Its totient is φ = 796640890.

The previous prime is 796640881. The next prime is 796640899. The reversal of 796640891 is 198046697.

It is a strong prime.

It is an emirp because it is prime and its reverse (198046697) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-796640891 is a prime.

It is not a weakly prime, because it can be changed into another prime (796640899) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 398320445 + 398320446.

It is an arithmetic number, because the mean of its divisors is an integer number (398320446).

Almost surely, 2^796640891 is an apocalyptic number.

796640891 is a deficient number, since it is larger than the sum of its proper divisors (1).

796640891 is an equidigital number, since it uses as much as digits as its factorization.

796640891 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 653184, while the sum is 50.

The square root of 796640891 is about 28224.8275636894. The cubic root of 796640891 is about 927.0166436951.

The spelling of 796640891 in words is "seven hundred ninety-six million, six hundred forty thousand, eight hundred ninety-one".