779838238897 has 2 divisors, whose sum is σ = 779838238898. Its totient is φ = 779838238896.

The previous prime is 779838238849. The next prime is 779838238969. The reversal of 779838238897 is 798832838977.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 729860953761 + 49977285136 = 854319^2 + 223556^2 .

It is a cyclic number.

It is not a de Polignac number, because 779838238897 - 2¹⁵ = 779838206129 is a prime.

It is not a weakly prime, because it can be changed into another prime (779838238807) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 389919119448 + 389919119449.

It is an arithmetic number, because the mean of its divisors is an integer number (389919119449).

Almost surely, 2^779838238897 is an apocalyptic number.

It is an amenable number.

779838238897 is a deficient number, since it is larger than the sum of its proper divisors (1).

779838238897 is an equidigital number, since it uses as much as digits as its factorization.

779838238897 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2048385024, while the sum is 79.

The spelling of 779838238897 in words is "seven hundred seventy-nine billion, eight hundred thirty-eight million, two hundred thirty-eight thousand, eight hundred ninety-seven".