779125257 has 8 divisors (see below), whose sum is σ = 1154259680. Its totient is φ = 519416820.

The previous prime is 779125247. The next prime is 779125273. The reversal of 779125257 is 752521977.

It is not a de Polignac number, because 779125257 - 2⁴ = 779125241 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (779125247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14428219 + ... + 14428272.

It is an arithmetic number, because the mean of its divisors is an integer number (144282460).

Almost surely, 2^779125257 is an apocalyptic number.

It is an amenable number.

779125257 is a deficient number, since it is larger than the sum of its proper divisors (375134423).

779125257 is a wasteful number, since it uses less digits than its factorization.

779125257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28856500 (or 28856494 counting only the distinct ones).

The product of its digits is 308700, while the sum is 45.

The square root of 779125257 is about 27912.8152825902. The cubic root of 779125257 is about 920.1721704400.

The spelling of 779125257 in words is "seven hundred seventy-nine million, one hundred twenty-five thousand, two hundred fifty-seven".