320899 has 2 divisors, whose sum is σ = 320900. Its totient is φ = 320898.

The previous prime is 320867. The next prime is 320911. The reversal of 320899 is 998023.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 320899 - 2⁵ = 320867 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 320899.

It is not a weakly prime, because it can be changed into another prime (320839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160449 + 160450.

It is an arithmetic number, because the mean of its divisors is an integer number (160450).

2³²⁰⁸⁹⁹ is an apocalyptic number.

320899 is a deficient number, since it is larger than the sum of its proper divisors (1).

320899 is an equidigital number, since it uses as much as digits as its factorization.

320899 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3888, while the sum is 31.

The square root of 320899 is about 566.4794788869. The cubic root of 320899 is about 68.4630308267.

It can be divided in two parts, 3 and 20899, that added together give a palindrome (20902).

The spelling of 320899 in words is "three hundred twenty thousand, eight hundred ninety-nine".