779838239009 has 2 divisors, whose sum is σ = 779838239010. Its totient is φ = 779838239008.

The previous prime is 779838238969. The next prime is 779838239029. The reversal of 779838239009 is 900932838977.

779838239009 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 749777614609 + 30060624400 = 865897^2 + 173380^2 .

It is a cyclic number.

It is not a de Polignac number, because 779838239009 - 2¹⁶ = 779838173473 is a prime.

It is not a weakly prime, because it can be changed into another prime (779838239029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 389919119504 + 389919119505.

It is an arithmetic number, because the mean of its divisors is an integer number (389919119505).

Almost surely, 2^779838239009 is an apocalyptic number.

It is an amenable number.

779838239009 is a deficient number, since it is larger than the sum of its proper divisors (1).

779838239009 is an equidigital number, since it uses as much as digits as its factorization.

779838239009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 41150592, while the sum is 65.

The spelling of 779838239009 in words is "seven hundred seventy-nine billion, eight hundred thirty-eight million, two hundred thirty-nine thousand, nine".