320775691 has 8 divisors (see below), whose sum is σ = 322969680. Its totient is φ = 318587808.

The previous prime is 320775667. The next prime is 320775761. The reversal of 320775691 is 196577023.

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 320775691 - 2⁹ = 320775179 is a prime.

It is not an unprimeable number, because it can be changed into a prime (320772691) 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, 154005 + ... + 156073.

It is an arithmetic number, because the mean of its divisors is an integer number (40371210).

Almost surely, 2^320775691 is an apocalyptic number.

320775691 is a deficient number, since it is larger than the sum of its proper divisors (2193989).

320775691 is a wasteful number, since it uses less digits than its factorization.

320775691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3053.

The product of its (nonzero) digits is 79380, while the sum is 40.

The square root of 320775691 is about 17910.2119194609. The cubic root of 320775691 is about 684.5426047691.

The spelling of 320775691 in words is "three hundred twenty million, seven hundred seventy-five thousand, six hundred ninety-one".