313511449 has 2 divisors, whose sum is σ = 313511450. Its totient is φ = 313511448.

The previous prime is 313511447. The next prime is 313511477. The reversal of 313511449 is 944115313.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 247495824 + 66015625 = 15732^2 + 8125^2 .

It is an emirp because it is prime and its reverse (944115313) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 313511449 - 2¹ = 313511447 is a prime.

Together with 313511447, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 313511449.

It is not a weakly prime, because it can be changed into another prime (313511447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156755724 + 156755725.

It is an arithmetic number, because the mean of its divisors is an integer number (156755725).

Almost surely, 2^313511449 is an apocalyptic number.

It is an amenable number.

313511449 is a deficient number, since it is larger than the sum of its proper divisors (1).

313511449 is an equidigital number, since it uses as much as digits as its factorization.

313511449 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6480, while the sum is 31.

The square root of 313511449 is about 17706.2545164131. The cubic root of 313511449 is about 679.3357476799.

The spelling of 313511449 in words is "three hundred thirteen million, five hundred eleven thousand, four hundred forty-nine".