320564603 has 4 divisors (see below), whose sum is σ = 320603520. Its totient is φ = 320525688.

The previous prime is 320564567. The next prime is 320564611. The reversal of 320564603 is 306465023.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 320564603 - 2¹⁴ = 320548219 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (320564623) 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, 1700 + ... + 25377.

It is an arithmetic number, because the mean of its divisors is an integer number (80150880).

Almost surely, 2^320564603 is an apocalyptic number.

320564603 is a deficient number, since it is larger than the sum of its proper divisors (38917).

320564603 is a wasteful number, since it uses less digits than its factorization.

320564603 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38916.

The product of its (nonzero) digits is 12960, while the sum is 29.

The square root of 320564603 is about 17904.3179987399. The cubic root of 320564603 is about 684.3924162926.

The spelling of 320564603 in words is "three hundred twenty million, five hundred sixty-four thousand, six hundred three".