316549609 has 2 divisors, whose sum is σ = 316549610. Its totient is φ = 316549608.

The previous prime is 316549601. The next prime is 316549627. The reversal of 316549609 is 906945613.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 169000000 + 147549609 = 13000^2 + 12147^2 .

It is a cyclic number.

It is not a de Polignac number, because 316549609 - 2³ = 316549601 is a prime.

It is not a weakly prime, because it can be changed into another prime (316549601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 158274804 + 158274805.

It is an arithmetic number, because the mean of its divisors is an integer number (158274805).

Almost surely, 2^316549609 is an apocalyptic number.

It is an amenable number.

316549609 is a deficient number, since it is larger than the sum of its proper divisors (1).

316549609 is an equidigital number, since it uses as much as digits as its factorization.

316549609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 174960, while the sum is 43.

The square root of 316549609 is about 17791.8410795510. The cubic root of 316549609 is about 681.5231205868.

The spelling of 316549609 in words is "three hundred sixteen million, five hundred forty-nine thousand, six hundred nine".