320109813 has 40 divisors (see below), whose sum is σ = 522720000. Its totient is φ = 194348160.

The previous prime is 320109773. The next prime is 320109833. The reversal of 320109813 is 318901023.

It is not a de Polignac number, because 320109813 - 2⁸ = 320109557 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320109833) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 38938 + ... + 46436.

It is an arithmetic number, because the mean of its divisors is an integer number (13068000).

Almost surely, 2^320109813 is an apocalyptic number.

It is an amenable number.

320109813 is a deficient number, since it is larger than the sum of its proper divisors (202610187).

320109813 is a wasteful number, since it uses less digits than its factorization.

320109813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7559 (or 7550 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The square root of 320109813 is about 17891.6129233784. The cubic root of 320109813 is about 684.0686103845.

The spelling of 320109813 in words is "three hundred twenty million, one hundred nine thousand, eight hundred thirteen".