316090381 has 2 divisors, whose sum is σ = 316090382. Its totient is φ = 316090380.

The previous prime is 316090321. The next prime is 316090387. The reversal of 316090381 is 183090613.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 196953156 + 119137225 = 14034^2 + 10915^2 .

It is a cyclic number.

It is not a de Polignac number, because 316090381 - 2²³ = 307701773 is a prime.

It is a super-2 number, since 2×316090381² = 199826257921450322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (316090387) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 158045190 + 158045191.

It is an arithmetic number, because the mean of its divisors is an integer number (158045191).

Almost surely, 2^316090381 is an apocalyptic number.

It is an amenable number.

316090381 is a deficient number, since it is larger than the sum of its proper divisors (1).

316090381 is an equidigital number, since it uses as much as digits as its factorization.

316090381 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3888, while the sum is 31.

The square root of 316090381 is about 17778.9308171217. The cubic root of 316090381 is about 681.1933924179.

The spelling of 316090381 in words is "three hundred sixteen million, ninety thousand, three hundred eighty-one".