779838238969 has 2 divisors, whose sum is σ = 779838238970. Its totient is φ = 779838238968.

The previous prime is 779838238897. The next prime is 779838239009. The reversal of 779838238969 is 969832838977.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 583372108944 + 196466130025 = 763788^2 + 443245^2 .

It is an emirp because it is prime and its reverse (969832838977) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 779838238969 - 2⁷ = 779838238841 is a prime.

It is a super-2 number, since 2×779838238969² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (779838208969) 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, 389919119484 + 389919119485.

It is an arithmetic number, because the mean of its divisors is an integer number (389919119485).

Almost surely, 2^779838238969 is an apocalyptic number.

It is an amenable number.

779838238969 is a deficient number, since it is larger than the sum of its proper divisors (1).

779838238969 is an equidigital number, since it uses as much as digits as its factorization.

779838238969 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1975228416, while the sum is 79.

The spelling of 779838238969 in words is "seven hundred seventy-nine billion, eight hundred thirty-eight million, two hundred thirty-eight thousand, nine hundred sixty-nine".