313890449 has 2 divisors, whose sum is σ = 313890450. Its totient is φ = 313890448.

The previous prime is 313890439. The next prime is 313890491. The reversal of 313890449 is 944098313.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 279959824 + 33930625 = 16732^2 + 5825^2 .

It is an emirp because it is prime and its reverse (944098313) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 313890449 - 2²⁰ = 312841873 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (313890419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156945224 + 156945225.

It is an arithmetic number, because the mean of its divisors is an integer number (156945225).

Almost surely, 2^313890449 is an apocalyptic number.

It is an amenable number.

313890449 is a deficient number, since it is larger than the sum of its proper divisors (1).

313890449 is an equidigital number, since it uses as much as digits as its factorization.

313890449 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 93312, while the sum is 41.

The square root of 313890449 is about 17716.9537167088. The cubic root of 313890449 is about 679.6093842236.

The spelling of 313890449 in words is "three hundred thirteen million, eight hundred ninety thousand, four hundred forty-nine".