317978929 has 2 divisors, whose sum is σ = 317978930. Its totient is φ = 317978928.

The previous prime is 317978911. The next prime is 317978951. The reversal of 317978929 is 929879713.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 281400625 + 36578304 = 16775^2 + 6048^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-317978929 is a prime.

It is a super-2 number, since 2×317978929² = 202221198575974082, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 317978929.

It is not a weakly prime, because it can be changed into another prime (317972929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 158989464 + 158989465.

It is an arithmetic number, because the mean of its divisors is an integer number (158989465).

Almost surely, 2^317978929 is an apocalyptic number.

It is an amenable number.

317978929 is a deficient number, since it is larger than the sum of its proper divisors (1).

317978929 is an equidigital number, since it uses as much as digits as its factorization.

317978929 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1714608, while the sum is 55.

The square root of 317978929 is about 17831.9636888370. The cubic root of 317978929 is about 682.5473435651.

The spelling of 317978929 in words is "three hundred seventeen million, nine hundred seventy-eight thousand, nine hundred twenty-nine".