313678909 has 2 divisors, whose sum is σ = 313678910. Its totient is φ = 313678908.

The previous prime is 313678907. The next prime is 313678913. The reversal of 313678909 is 909876313.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 282072025 + 31606884 = 16795^2 + 5622^2 .

It is a cyclic number.

It is not a de Polignac number, because 313678909 - 2¹ = 313678907 is a prime.

Together with 313678907, 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 (313678907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156839454 + 156839455.

It is an arithmetic number, because the mean of its divisors is an integer number (156839455).

Almost surely, 2^313678909 is an apocalyptic number.

It is an amenable number.

313678909 is a deficient number, since it is larger than the sum of its proper divisors (1).

313678909 is an equidigital number, since it uses as much as digits as its factorization.

313678909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 244944, while the sum is 46.

The square root of 313678909 is about 17710.9827225933. The cubic root of 313678909 is about 679.4566803345.

The spelling of 313678909 in words is "three hundred thirteen million, six hundred seventy-eight thousand, nine hundred nine".