317898643 has 2 divisors, whose sum is σ = 317898644. Its totient is φ = 317898642.

The previous prime is 317898631. The next prime is 317898649. The reversal of 317898643 is 346898713.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-317898643 is a prime.

It is not a weakly prime, because it can be changed into another prime (317898649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 158949321 + 158949322.

It is an arithmetic number, because the mean of its divisors is an integer number (158949322).

Almost surely, 2^317898643 is an apocalyptic number.

317898643 is a deficient number, since it is larger than the sum of its proper divisors (1).

317898643 is an equidigital number, since it uses as much as digits as its factorization.

317898643 is an evil number, because the sum of its binary digits is even.

The product of its digits is 870912, while the sum is 49.

The square root of 317898643 is about 17829.7123644774. The cubic root of 317898643 is about 682.4898936277.

The spelling of 317898643 in words is "three hundred seventeen million, eight hundred ninety-eight thousand, six hundred forty-three".