317648549 has 2 divisors, whose sum is σ = 317648550. Its totient is φ = 317648548.

The previous prime is 317648543. The next prime is 317648579. The reversal of 317648549 is 945846713.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 302516449 + 15132100 = 17393^2 + 3890^2 .

It is a cyclic number.

It is not a de Polignac number, because 317648549 - 2²⁰ = 316599973 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (317648543) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 158824274 + 158824275.

It is an arithmetic number, because the mean of its divisors is an integer number (158824275).

Almost surely, 2^317648549 is an apocalyptic number.

It is an amenable number.

317648549 is a deficient number, since it is larger than the sum of its proper divisors (1).

317648549 is an equidigital number, since it uses as much as digits as its factorization.

317648549 is an evil number, because the sum of its binary digits is even.

The product of its digits is 725760, while the sum is 47.

The square root of 317648549 is about 17822.6975792106. The cubic root of 317648549 is about 682.3108728286.

The spelling of 317648549 in words is "three hundred seventeen million, six hundred forty-eight thousand, five hundred forty-nine".