320657091 has 8 divisors (see below), whose sum is σ = 450045120. Its totient is φ = 202520232.

The previous prime is 320657069. The next prime is 320657159. The reversal of 320657091 is 190756023.

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

It is not a de Polignac number, because 320657091 - 2⁹ = 320656579 is a prime.

It is not an unprimeable number, because it can be changed into a prime (320652091) 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, 2812725 + ... + 2812838.

It is an arithmetic number, because the mean of its divisors is an integer number (56255640).

Almost surely, 2^320657091 is an apocalyptic number.

320657091 is a deficient number, since it is larger than the sum of its proper divisors (129388029).

320657091 is a wasteful number, since it uses less digits than its factorization.

320657091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5625585.

The product of its (nonzero) digits is 11340, while the sum is 33.

The square root of 320657091 is about 17906.9006531002. The cubic root of 320657091 is about 684.4582293390.

The spelling of 320657091 in words is "three hundred twenty million, six hundred fifty-seven thousand, ninety-one".