316402091 has 2 divisors, whose sum is σ = 316402092. Its totient is φ = 316402090.

The previous prime is 316402081. The next prime is 316402109. The reversal of 316402091 is 190204613.

Together with next prime (316402109) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 316402091 - 2¹⁰ = 316401067 is a prime.

It is a super-2 number, since 2×316402091² = 200220566378344562, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 316402091.

It is not a weakly prime, because it can be changed into another prime (316402061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 158201045 + 158201046.

It is an arithmetic number, because the mean of its divisors is an integer number (158201046).

Almost surely, 2^316402091 is an apocalyptic number.

316402091 is a deficient number, since it is larger than the sum of its proper divisors (1).

316402091 is an equidigital number, since it uses as much as digits as its factorization.

316402091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 316402091 is about 17787.6949321715. The cubic root of 316402091 is about 681.4172366577.

The spelling of 316402091 in words is "three hundred sixteen million, four hundred two thousand, ninety-one".