317742979 has 2 divisors, whose sum is σ = 317742980. Its totient is φ = 317742978.

The previous prime is 317742973. The next prime is 317742991. The reversal of 317742979 is 979247713.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-317742979 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (317742973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 158871489 + 158871490.

It is an arithmetic number, because the mean of its divisors is an integer number (158871490).

Almost surely, 2^317742979 is an apocalyptic number.

317742979 is a deficient number, since it is larger than the sum of its proper divisors (1).

317742979 is an equidigital number, since it uses as much as digits as its factorization.

317742979 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 666792, while the sum is 49.

The square root of 317742979 is about 17825.3465323959. The cubic root of 317742979 is about 682.3784781872.

The spelling of 317742979 in words is "three hundred seventeen million, seven hundred forty-two thousand, nine hundred seventy-nine".