317417987 has 2 divisors, whose sum is σ = 317417988. Its totient is φ = 317417986.

The previous prime is 317417957. The next prime is 317417993. The reversal of 317417987 is 789714713.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 317417987 - 2⁶ = 317417923 is a prime.

It is a super-2 number, since 2×317417987² = 201508356942264338, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (317417957) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 158708993 + 158708994.

It is an arithmetic number, because the mean of its divisors is an integer number (158708994).

Almost surely, 2^317417987 is an apocalyptic number.

317417987 is a deficient number, since it is larger than the sum of its proper divisors (1).

317417987 is an equidigital number, since it uses as much as digits as its factorization.

317417987 is an evil number, because the sum of its binary digits is even.

The product of its digits is 296352, while the sum is 47.

The square root of 317417987 is about 17816.2281922970. The cubic root of 317417987 is about 682.1457500463.

The spelling of 317417987 in words is "three hundred seventeen million, four hundred seventeen thousand, nine hundred eighty-seven".