779640423 has 8 divisors (see below), whose sum is σ = 1042003200. Its totient is φ = 518518968.

The previous prime is 779640419. The next prime is 779640467. The reversal of 779640423 is 324046977.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 779640423 - 2² = 779640419 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (779640403) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 308863 + ... + 311376.

It is an arithmetic number, because the mean of its divisors is an integer number (130250400).

Almost surely, 2^779640423 is an apocalyptic number.

779640423 is a deficient number, since it is larger than the sum of its proper divisors (262362777).

779640423 is a wasteful number, since it uses less digits than its factorization.

779640423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 620661.

The product of its (nonzero) digits is 254016, while the sum is 42.

The square root of 779640423 is about 27922.0418845041. The cubic root of 779640423 is about 920.3749350019.

The spelling of 779640423 in words is "seven hundred seventy-nine million, six hundred forty thousand, four hundred twenty-three".