320645099 has 2 divisors, whose sum is σ = 320645100. Its totient is φ = 320645098.

The previous prime is 320645089. The next prime is 320645107. The reversal of 320645099 is 990546023.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 320645099 - 2²⁸ = 52209643 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (320645069) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160322549 + 160322550.

It is an arithmetic number, because the mean of its divisors is an integer number (160322550).

Almost surely, 2^320645099 is an apocalyptic number.

320645099 is a deficient number, since it is larger than the sum of its proper divisors (1).

320645099 is an equidigital number, since it uses as much as digits as its factorization.

320645099 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 58320, while the sum is 38.

The square root of 320645099 is about 17906.5658069882. The cubic root of 320645099 is about 684.4496967293.

The spelling of 320645099 in words is "three hundred twenty million, six hundred forty-five thousand, ninety-nine".