317145869 has 2 divisors, whose sum is σ = 317145870. Its totient is φ = 317145868.

The previous prime is 317145839. The next prime is 317145901. The reversal of 317145869 is 968541713.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 246804100 + 70341769 = 15710^2 + 8387^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-317145869 is a prime.

It is a super-2 number, since 2×317145869² = 201163004447530322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (317145839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 158572934 + 158572935.

It is an arithmetic number, because the mean of its divisors is an integer number (158572935).

Almost surely, 2^317145869 is an apocalyptic number.

It is an amenable number.

317145869 is a deficient number, since it is larger than the sum of its proper divisors (1).

317145869 is an equidigital number, since it uses as much as digits as its factorization.

317145869 is an evil number, because the sum of its binary digits is even.

The product of its digits is 181440, while the sum is 44.

The square root of 317145869 is about 17808.5897532623. The cubic root of 317145869 is about 681.9507629794.

The spelling of 317145869 in words is "three hundred seventeen million, one hundred forty-five thousand, eight hundred sixty-nine".