316567921 has 2 divisors, whose sum is σ = 316567922. Its totient is φ = 316567920.

The previous prime is 316567879. The next prime is 316567943. The reversal of 316567921 is 129765613.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 314565696 + 2002225 = 17736^2 + 1415^2 .

It is a cyclic number.

It is not a de Polignac number, because 316567921 - 2²⁷ = 182350193 is a prime.

It is not a weakly prime, because it can be changed into another prime (316567621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 158283960 + 158283961.

It is an arithmetic number, because the mean of its divisors is an integer number (158283961).

Almost surely, 2^316567921 is an apocalyptic number.

It is an amenable number.

316567921 is a deficient number, since it is larger than the sum of its proper divisors (1).

316567921 is an equidigital number, since it uses as much as digits as its factorization.

316567921 is an evil number, because the sum of its binary digits is even.

The product of its digits is 68040, while the sum is 40.

The square root of 316567921 is about 17792.3556900147. The cubic root of 316567921 is about 681.5362620875.

The spelling of 316567921 in words is "three hundred sixteen million, five hundred sixty-seven thousand, nine hundred twenty-one".