320040569 has 2 divisors, whose sum is σ = 320040570. Its totient is φ = 320040568.

The previous prime is 320040533. The next prime is 320040571. The reversal of 320040569 is 965040023.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 319980544 + 60025 = 17888^2 + 245^2 .

It is a cyclic number.

It is not a de Polignac number, because 320040569 - 2²⁰ = 318991993 is a prime.

It is a super-2 number, since 2×320040569² = 204851931611687522, which contains 22 as substring.

Together with 320040571, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (320045569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160020284 + 160020285.

It is an arithmetic number, because the mean of its divisors is an integer number (160020285).

Almost surely, 2^320040569 is an apocalyptic number.

It is an amenable number.

320040569 is a deficient number, since it is larger than the sum of its proper divisors (1).

320040569 is an equidigital number, since it uses as much as digits as its factorization.

320040569 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6480, while the sum is 29.

The square root of 320040569 is about 17889.6777220832. The cubic root of 320040569 is about 684.0192824552.

The spelling of 320040569 in words is "three hundred twenty million, forty thousand, five hundred sixty-nine".