791809820927 has 2 divisors, whose sum is σ = 791809820928. Its totient is φ = 791809820926.

The previous prime is 791809820909. The next prime is 791809820939. The reversal of 791809820927 is 729028908197.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 791809820927 - 2⁸ = 791809820671 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 791809820927.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (791809220927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 395904910463 + 395904910464.

It is an arithmetic number, because the mean of its divisors is an integer number (395904910464).

Almost surely, 2^791809820927 is an apocalyptic number.

791809820927 is a deficient number, since it is larger than the sum of its proper divisors (1).

791809820927 is an equidigital number, since it uses as much as digits as its factorization.

791809820927 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9144576, while the sum is 62.

The spelling of 791809820927 in words is "seven hundred ninety-one billion, eight hundred nine million, eight hundred twenty thousand, nine hundred twenty-seven".