2123999 has 2 divisors, whose sum is σ = 2124000. Its totient is φ = 2123998.

The previous prime is 2123983. The next prime is 2124007. The reversal of 2123999 is 9993212.

2123999 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2123999 - 2⁴ = 2123983 is a prime.

It is a super-2 number, since 2×2123999² = 9022743504002, which contains 22 as substring.

It is a d-powerful number, because it can be written as 2⁹ + 1 + 2²¹ + 3⁹ + 9 + 9² + 9⁴ .

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2123909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1061999 + 1062000.

It is an arithmetic number, because the mean of its divisors is an integer number (1062000).

2^2123999 is an apocalyptic number.

2123999 is a deficient number, since it is larger than the sum of its proper divisors (1).

2123999 is an equidigital number, since it uses as much as digits as its factorization.

2123999 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 2123999 is about 1457.3945931010. The cubic root of 2123999 is about 128.5438892810.

The spelling of 2123999 in words is "two million, one hundred twenty-three thousand, nine hundred ninety-nine".