779090509397 has 2 divisors, whose sum is σ = 779090509398. Its totient is φ = 779090509396.

The previous prime is 779090509387. The next prime is 779090509459. The reversal of 779090509397 is 793905090977.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 536594340676 + 242496168721 = 732526^2 + 492439^2 .

It is a cyclic number.

It is not a de Polignac number, because 779090509397 - 2¹⁶ = 779090443861 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (779090509387) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 389545254698 + 389545254699.

It is an arithmetic number, because the mean of its divisors is an integer number (389545254699).

Almost surely, 2^779090509397 is an apocalyptic number.

It is an amenable number.

779090509397 is a deficient number, since it is larger than the sum of its proper divisors (1).

779090509397 is an equidigital number, since it uses as much as digits as its factorization.

779090509397 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 33756345, while the sum is 65.

The spelling of 779090509397 in words is "seven hundred seventy-nine billion, ninety million, five hundred nine thousand, three hundred ninety-seven".