2321999 has 2 divisors, whose sum is σ = 2322000. Its totient is φ = 2321998.

The previous prime is 2321989. The next prime is 2322031. The reversal of 2321999 is 9991232.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2321999 - 2²⁰ = 1273423 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2321909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1160999 + 1161000.

It is an arithmetic number, because the mean of its divisors is an integer number (1161000).

2^2321999 is an apocalyptic number.

2321999 is a deficient number, since it is larger than the sum of its proper divisors (1).

2321999 is an equidigital number, since it uses as much as digits as its factorization.

2321999 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8748, while the sum is 35.

The square root of 2321999 is about 1523.8106837793. The cubic root of 2321999 is about 132.4201298638.

It can be divided in two parts, 23 and 21999, that added together give a palindrome (22022).

The spelling of 2321999 in words is "two million, three hundred twenty-one thousand, nine hundred ninety-nine".