317240489 has 2 divisors, whose sum is σ = 317240490. Its totient is φ = 317240488.

The previous prime is 317240461. The next prime is 317240491. The reversal of 317240489 is 984042713.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 313573264 + 3667225 = 17708^2 + 1915^2 .

It is a cyclic number.

It is not a de Polignac number, because 317240489 - 2²⁸ = 48805033 is a prime.

Together with 317240491, 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 (317240419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 158620244 + 158620245.

It is an arithmetic number, because the mean of its divisors is an integer number (158620245).

Almost surely, 2^317240489 is an apocalyptic number.

It is an amenable number.

317240489 is a deficient number, since it is larger than the sum of its proper divisors (1).

317240489 is an equidigital number, since it uses as much as digits as its factorization.

317240489 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48384, while the sum is 38.

The square root of 317240489 is about 17811.2461383251. The cubic root of 317240489 is about 682.0185759023.

The spelling of 317240489 in words is "three hundred seventeen million, two hundred forty thousand, four hundred eighty-nine".