2123239 has 2 divisors, whose sum is σ = 2123240. Its totient is φ = 2123238.

The previous prime is 2123237. The next prime is 2123243. The reversal of 2123239 is 9323212.

2123239 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2123239 - 2¹ = 2123237 is a prime.

It is a super-2 number, since 2×2123239² = 9016287702242, which contains 22 as substring.

Together with 2123237, it forms a pair of twin primes.

It is a Chen prime.

2123239 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2123237) 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, 1061619 + 1061620.

It is an arithmetic number, because the mean of its divisors is an integer number (1061620).

2^2123239 is an apocalyptic number.

2123239 is a deficient number, since it is larger than the sum of its proper divisors (1).

2123239 is an equidigital number, since it uses as much as digits as its factorization.

2123239 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 648, while the sum is 22.

The square root of 2123239 is about 1457.1338305043. The cubic root of 2123239 is about 128.5285557819.

The spelling of 2123239 in words is "two million, one hundred twenty-three thousand, two hundred thirty-nine".