313645809 has 8 divisors (see below), whose sum is σ = 418707072. Its totient is φ = 208840880.

The previous prime is 313645793. The next prime is 313645841. The reversal of 313645809 is 908546313.

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 313645809 - 2⁴ = 313645793 is a prime.

It is not an unprimeable number, because it can be changed into a prime (313645909) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 61209 + ... + 66134.

It is an arithmetic number, because the mean of its divisors is an integer number (52338384).

Almost surely, 2^313645809 is an apocalyptic number.

It is an amenable number.

313645809 is a deficient number, since it is larger than the sum of its proper divisors (105061263).

313645809 is a wasteful number, since it uses less digits than its factorization.

313645809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128167.

The product of its (nonzero) digits is 77760, while the sum is 39.

The square root of 313645809 is about 17710.0482495108. The cubic root of 313645809 is about 679.4327803032.

It can be divided in two parts, 31364 and 5809, that added together give a palindrome (37173).

The spelling of 313645809 in words is "three hundred thirteen million, six hundred forty-five thousand, eight hundred nine".