313945909 has 8 divisors (see below), whose sum is σ = 325251000. Its totient is φ = 302672832.

The previous prime is 313945901. The next prime is 313945927. The reversal of 313945909 is 909549313.

It can be written as a sum of positive squares in 4 ways, for example, as 9548100 + 304397809 = 3090^2 + 17447^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 313945909 - 2³ = 313945901 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (313945901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12927 + ... + 28195.

It is an arithmetic number, because the mean of its divisors is an integer number (40656375).

Almost surely, 2^313945909 is an apocalyptic number.

It is an amenable number.

313945909 is a deficient number, since it is larger than the sum of its proper divisors (11305091).

313945909 is a wasteful number, since it uses less digits than its factorization.

313945909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16007.

The product of its (nonzero) digits is 131220, while the sum is 43.

The square root of 313945909 is about 17718.5188150703. The cubic root of 313945909 is about 679.6494076532.

The spelling of 313945909 in words is "three hundred thirteen million, nine hundred forty-five thousand, nine hundred nine".