316391779 has 4 divisors (see below), whose sum is σ = 345154680. Its totient is φ = 287628880.

The previous prime is 316391771. The next prime is 316391783. The reversal of 316391779 is 977193613.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 977193613 = 11 ⋅88835783.

It is not a de Polignac number, because 316391779 - 2³ = 316391771 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (316391771) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14381434 + ... + 14381455.

It is an arithmetic number, because the mean of its divisors is an integer number (86288670).

Almost surely, 2^316391779 is an apocalyptic number.

316391779 is a deficient number, since it is larger than the sum of its proper divisors (28762901).

316391779 is a wasteful number, since it uses less digits than its factorization.

316391779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28762900.

The product of its digits is 214326, while the sum is 46.

The square root of 316391779 is about 17787.4050665070. The cubic root of 316391779 is about 681.4098337874.

The spelling of 316391779 in words is "three hundred sixteen million, three hundred ninety-one thousand, seven hundred seventy-nine".