317991743 has 2 divisors, whose sum is σ = 317991744. Its totient is φ = 317991742.

The previous prime is 317991703. The next prime is 317991761. The reversal of 317991743 is 347199713.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 317991743 - 2¹² = 317987647 is a prime.

It is a super-2 number, since 2×317991743² = 202237497232356098, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 317991694 and 317991703.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (317991703) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 158995871 + 158995872.

It is an arithmetic number, because the mean of its divisors is an integer number (158995872).

Almost surely, 2^317991743 is an apocalyptic number.

317991743 is a deficient number, since it is larger than the sum of its proper divisors (1).

317991743 is an equidigital number, since it uses as much as digits as its factorization.

317991743 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 142884, while the sum is 44.

The square root of 317991743 is about 17832.3229838403. The cubic root of 317991743 is about 682.5565119338.

The spelling of 317991743 in words is "three hundred seventeen million, nine hundred ninety-one thousand, seven hundred forty-three".