317720479 has 2 divisors, whose sum is σ = 317720480. Its totient is φ = 317720478.

The previous prime is 317720467. The next prime is 317720483. The reversal of 317720479 is 974027713.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 317720479 - 2⁹ = 317719967 is a prime.

It is equal to p_17158990 and since 317720479 and 17158990 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (317720449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 158860239 + 158860240.

It is an arithmetic number, because the mean of its divisors is an integer number (158860240).

Almost surely, 2^317720479 is an apocalyptic number.

317720479 is a deficient number, since it is larger than the sum of its proper divisors (1).

317720479 is an equidigital number, since it uses as much as digits as its factorization.

317720479 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 74088, while the sum is 40.

The square root of 317720479 is about 17824.7153974474. The cubic root of 317720479 is about 682.3623709567.

The spelling of 317720479 in words is "three hundred seventeen million, seven hundred twenty thousand, four hundred seventy-nine".