317616641 has 2 divisors, whose sum is σ = 317616642. Its totient is φ = 317616640.

The previous prime is 317616631. The next prime is 317616643. The reversal of 317616641 is 146616713.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 248377600 + 69239041 = 15760^2 + 8321^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-317616641 is a prime.

Together with 317616643, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (317616643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 158808320 + 158808321.

It is an arithmetic number, because the mean of its divisors is an integer number (158808321).

Almost surely, 2^317616641 is an apocalyptic number.

It is an amenable number.

317616641 is a deficient number, since it is larger than the sum of its proper divisors (1).

317616641 is an equidigital number, since it uses as much as digits as its factorization.

317616641 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18144, while the sum is 35.

The square root of 317616641 is about 17821.8024060419. The cubic root of 317616641 is about 682.2880258757.

The spelling of 317616641 in words is "three hundred seventeen million, six hundred sixteen thousand, six hundred forty-one".