317319643 has 2 divisors, whose sum is σ = 317319644. Its totient is φ = 317319642.

The previous prime is 317319617. The next prime is 317319647. The reversal of 317319643 is 346913713.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-317319643 is a prime.

It is not a weakly prime, because it can be changed into another prime (317319647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 158659821 + 158659822.

It is an arithmetic number, because the mean of its divisors is an integer number (158659822).

Almost surely, 2^317319643 is an apocalyptic number.

317319643 is a deficient number, since it is larger than the sum of its proper divisors (1).

317319643 is an equidigital number, since it uses as much as digits as its factorization.

317319643 is an evil number, because the sum of its binary digits is even.

The product of its digits is 40824, while the sum is 37.

The square root of 317319643 is about 17813.4680228191. The cubic root of 317319643 is about 682.0752941870.

The spelling of 317319643 in words is "three hundred seventeen million, three hundred nineteen thousand, six hundred forty-three".