317278979 has 4 divisors (see below), whose sum is σ = 317544360. Its totient is φ = 317013600.

The previous prime is 317278963. The next prime is 317278981. The reversal of 317278979 is 979872713.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 317278979 - 2⁴ = 317278963 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 317278979.

It is not an unprimeable number, because it can be changed into a prime (317278079) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 130889 + ... + 133290.

It is an arithmetic number, because the mean of its divisors is an integer number (79386090).

Almost surely, 2^317278979 is an apocalyptic number.

317278979 is a deficient number, since it is larger than the sum of its proper divisors (265381).

317278979 is a wasteful number, since it uses less digits than its factorization.

317278979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 265380.

The product of its digits is 1333584, while the sum is 53.

The square root of 317278979 is about 17812.3266026648. The cubic root of 317278979 is about 682.0461573264.

The spelling of 317278979 in words is "three hundred seventeen million, two hundred seventy-eight thousand, nine hundred seventy-nine".