313456909 has 2 divisors, whose sum is σ = 313456910. Its totient is φ = 313456908.

The previous prime is 313456907. The next prime is 313456921. The reversal of 313456909 is 909654313.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 309654409 + 3802500 = 17597^2 + 1950^2 .

It is an emirp because it is prime and its reverse (909654313) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 313456909 - 2¹ = 313456907 is a prime.

Together with 313456907, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (313456907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156728454 + 156728455.

It is an arithmetic number, because the mean of its divisors is an integer number (156728455).

Almost surely, 2^313456909 is an apocalyptic number.

It is an amenable number.

313456909 is a deficient number, since it is larger than the sum of its proper divisors (1).

313456909 is an equidigital number, since it uses as much as digits as its factorization.

313456909 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 87480, while the sum is 40.

The square root of 313456909 is about 17704.7143156844. The cubic root of 313456909 is about 679.2963518614.

The spelling of 313456909 in words is "three hundred thirteen million, four hundred fifty-six thousand, nine hundred nine".