313230209 has 2 divisors, whose sum is σ = 313230210. Its totient is φ = 313230208.

The previous prime is 313230199. The next prime is 313230217. The reversal of 313230209 is 902032313.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 218596225 + 94633984 = 14785^2 + 9728^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-313230209 is a prime.

It is a super-2 number, since 2×313230209² = 196226327660367362, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (313230509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156615104 + 156615105.

It is an arithmetic number, because the mean of its divisors is an integer number (156615105).

Almost surely, 2^313230209 is an apocalyptic number.

It is an amenable number.

313230209 is a deficient number, since it is larger than the sum of its proper divisors (1).

313230209 is an equidigital number, since it uses as much as digits as its factorization.

313230209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 972, while the sum is 23.

The square root of 313230209 is about 17698.3109081065. The cubic root of 313230209 is about 679.1325509070.

The spelling of 313230209 in words is "three hundred thirteen million, two hundred thirty thousand, two hundred nine".