320931909 has 8 divisors (see below), whose sum is σ = 475454720. Its totient is φ = 213954588.

The previous prime is 320931889. The next prime is 320931911. The reversal of 320931909 is 909139023.

It is not a de Polignac number, because 320931909 - 2¹⁵ = 320899141 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 (320931959) 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, 5943157 + ... + 5943210.

It is an arithmetic number, because the mean of its divisors is an integer number (59431840).

Almost surely, 2^320931909 is an apocalyptic number.

It is an amenable number.

320931909 is a deficient number, since it is larger than the sum of its proper divisors (154522811).

320931909 is a wasteful number, since it uses less digits than its factorization.

320931909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11886376 (or 11886370 counting only the distinct ones).

The product of its (nonzero) digits is 13122, while the sum is 36.

The square root of 320931909 is about 17914.5725318803. The cubic root of 320931909 is about 684.6537109873.

The spelling of 320931909 in words is "three hundred twenty million, nine hundred thirty-one thousand, nine hundred nine".