320878583 has 2 divisors, whose sum is σ = 320878584. Its totient is φ = 320878582.

The previous prime is 320878573. The next prime is 320878601. The reversal of 320878583 is 385878023.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 320878583 - 2²⁴ = 304101367 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (320878573) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160439291 + 160439292.

It is an arithmetic number, because the mean of its divisors is an integer number (160439292).

Almost surely, 2^320878583 is an apocalyptic number.

320878583 is a deficient number, since it is larger than the sum of its proper divisors (1).

320878583 is an equidigital number, since it uses as much as digits as its factorization.

320878583 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 322560, while the sum is 44.

The square root of 320878583 is about 17913.0841286474. The cubic root of 320878583 is about 684.6157882326.

The spelling of 320878583 in words is "three hundred twenty million, eight hundred seventy-eight thousand, five hundred eighty-three".