320485999 has 2 divisors, whose sum is σ = 320486000. Its totient is φ = 320485998.

The previous prime is 320485961. The next prime is 320486027. The reversal of 320485999 is 999584023.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 320485999 - 2⁷ = 320485871 is a prime.

It is a super-2 number, since 2×320485999² = 205422551110056002, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (320485909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160242999 + 160243000.

It is an arithmetic number, because the mean of its divisors is an integer number (160243000).

Almost surely, 2^320485999 is an apocalyptic number.

320485999 is a deficient number, since it is larger than the sum of its proper divisors (1).

320485999 is an equidigital number, since it uses as much as digits as its factorization.

320485999 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 699840, while the sum is 49.

The square root of 320485999 is about 17902.1227512270. The cubic root of 320485999 is about 684.3364729366.

The spelling of 320485999 in words is "three hundred twenty million, four hundred eighty-five thousand, nine hundred ninety-nine".