320260999 has 2 divisors, whose sum is σ = 320261000. Its totient is φ = 320260998.

The previous prime is 320260981. The next prime is 320261057. The reversal of 320260999 is 999062023.

It is a weak prime.

It is an emirp because it is prime and its reverse (999062023) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 320260999 - 2¹⁵ = 320228231 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (320260099) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160130499 + 160130500.

It is an arithmetic number, because the mean of its divisors is an integer number (160130500).

Almost surely, 2^320260999 is an apocalyptic number.

320260999 is a deficient number, since it is larger than the sum of its proper divisors (1).

320260999 is an equidigital number, since it uses as much as digits as its factorization.

320260999 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 52488, while the sum is 40.

The square root of 320260999 is about 17895.8374769107. The cubic root of 320260999 is about 684.1762873078.

The spelling of 320260999 in words is "three hundred twenty million, two hundred sixty thousand, nine hundred ninety-nine".