320828713 has 4 divisors (see below), whose sum is σ = 324433620. Its totient is φ = 317223808.

The previous prime is 320828687. The next prime is 320828749. The reversal of 320828713 is 317828023.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 171793449 + 149035264 = 13107^2 + 12208^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-320828713 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (320828113) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1802320 + ... + 1802497.

It is an arithmetic number, because the mean of its divisors is an integer number (81108405).

Almost surely, 2^320828713 is an apocalyptic number.

It is an amenable number.

320828713 is a deficient number, since it is larger than the sum of its proper divisors (3604907).

320828713 is an equidigital number, since it uses as much as digits as its factorization.

320828713 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3604906.

The product of its (nonzero) digits is 16128, while the sum is 34.

The square root of 320828713 is about 17911.6920752898. The cubic root of 320828713 is about 684.5803194083.

The spelling of 320828713 in words is "three hundred twenty million, eight hundred twenty-eight thousand, seven hundred thirteen".