313097209 has 2 divisors, whose sum is σ = 313097210. Its totient is φ = 313097208.

The previous prime is 313097167. The next prime is 313097227. The reversal of 313097209 is 902790313.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 251317609 + 61779600 = 15853^2 + 7860^2 .

It is an emirp because it is prime and its reverse (902790313) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-313097209 is a prime.

It is not a weakly prime, because it can be changed into another prime (313097269) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156548604 + 156548605.

It is an arithmetic number, because the mean of its divisors is an integer number (156548605).

Almost surely, 2^313097209 is an apocalyptic number.

It is an amenable number.

313097209 is a deficient number, since it is larger than the sum of its proper divisors (1).

313097209 is an equidigital number, since it uses as much as digits as its factorization.

313097209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10206, while the sum is 34.

The square root of 313097209 is about 17694.5530884507. The cubic root of 313097209 is about 679.0364156324.

The spelling of 313097209 in words is "three hundred thirteen million, ninety-seven thousand, two hundred nine".