316891297 has 2 divisors, whose sum is σ = 316891298. Its totient is φ = 316891296.

The previous prime is 316891283. The next prime is 316891327. The reversal of 316891297 is 792198613.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 279424656 + 37466641 = 16716^2 + 6121^2 .

It is an emirp because it is prime and its reverse (792198613) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-316891297 is a prime.

It is a super-2 number, since 2×316891297² = 200840188228684418, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (316891097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 158445648 + 158445649.

It is an arithmetic number, because the mean of its divisors is an integer number (158445649).

Almost surely, 2^316891297 is an apocalyptic number.

It is an amenable number.

316891297 is a deficient number, since it is larger than the sum of its proper divisors (1).

316891297 is an equidigital number, since it uses as much as digits as its factorization.

316891297 is an evil number, because the sum of its binary digits is even.

The product of its digits is 163296, while the sum is 46.

The square root of 316891297 is about 17801.4408686488. The cubic root of 316891297 is about 681.7682475522.

It can be divided in two parts, 31 and 6891297, that added together give a triangular number (6891328 = T₃₇₁₂).

The spelling of 316891297 in words is "three hundred sixteen million, eight hundred ninety-one thousand, two hundred ninety-seven".