797968779 has 4 divisors (see below), whose sum is σ = 1063958376. Its totient is φ = 531979184.

The previous prime is 797968753. The next prime is 797968789. The reversal of 797968779 is 977869797.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 797968779 - 2¹⁵ = 797936011 is a prime.

It is not an unprimeable number, because it can be changed into a prime (797968709) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 132994794 + ... + 132994799.

It is an arithmetic number, because the mean of its divisors is an integer number (265989594).

Almost surely, 2^797968779 is an apocalyptic number.

797968779 is a deficient number, since it is larger than the sum of its proper divisors (265989597).

797968779 is a wasteful number, since it uses less digits than its factorization.

797968779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 265989596.

The product of its digits is 84015792, while the sum is 69.

The square root of 797968779 is about 28248.3411725361. The cubic root of 797968779 is about 927.5314264410.

The spelling of 797968779 in words is "seven hundred ninety-seven million, nine hundred sixty-eight thousand, seven hundred seventy-nine".