316891009 has 4 divisors (see below), whose sum is σ = 324620100. Its totient is φ = 309161920.

The previous prime is 316891007. The next prime is 316891019. The reversal of 316891009 is 900198613.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 134560000 + 182331009 = 11600^2 + 13503^2 .

It is a cyclic number.

It is not a de Polignac number, because 316891009 - 2¹ = 316891007 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (316891007) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3864484 + ... + 3864565.

It is an arithmetic number, because the mean of its divisors is an integer number (81155025).

Almost surely, 2^316891009 is an apocalyptic number.

It is an amenable number.

316891009 is a deficient number, since it is larger than the sum of its proper divisors (7729091).

316891009 is an equidigital number, since it uses as much as digits as its factorization.

316891009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7729090.

The product of its (nonzero) digits is 11664, while the sum is 37.

The square root of 316891009 is about 17801.4327794141. The cubic root of 316891009 is about 681.7680410152.

The spelling of 316891009 in words is "three hundred sixteen million, eight hundred ninety-one thousand, nine".