320617563 has 16 divisors (see below), whose sum is σ = 488898816. Its totient is φ = 183083040.

The previous prime is 320617559. The next prime is 320617567. The reversal of 320617563 is 365716023.

It is an interprime number because it is at equal distance from previous prime (320617559) and next prime (320617567).

It is not a de Polignac number, because 320617563 - 2² = 320617559 is a prime.

It is not an unprimeable number, because it can be changed into a prime (320617567) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31753 + ... + 40613.

It is an arithmetic number, because the mean of its divisors is an integer number (30556176).

Almost surely, 2^320617563 is an apocalyptic number.

320617563 is a deficient number, since it is larger than the sum of its proper divisors (168281253).

320617563 is a wasteful number, since it uses less digits than its factorization.

320617563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10594.

The product of its (nonzero) digits is 22680, while the sum is 33.

The square root of 320617563 is about 17905.7969104980. The cubic root of 320617563 is about 684.4301033674.

The spelling of 320617563 in words is "three hundred twenty million, six hundred seventeen thousand, five hundred sixty-three".