2123279 has 2 divisors, whose sum is σ = 2123280. Its totient is φ = 2123278.

The previous prime is 2123263. The next prime is 2123281. The reversal of 2123279 is 9723212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2123279 - 2⁴ = 2123263 is a prime.

Together with 2123281, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2123239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1061639 + 1061640.

It is an arithmetic number, because the mean of its divisors is an integer number (1061640).

2^2123279 is an apocalyptic number.

2123279 is a deficient number, since it is larger than the sum of its proper divisors (1).

2123279 is an equidigital number, since it uses as much as digits as its factorization.

2123279 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1512, while the sum is 26.

The square root of 2123279 is about 1457.1475560148. The cubic root of 2123279 is about 128.5293628993.

The spelling of 2123279 in words is "two million, one hundred twenty-three thousand, two hundred seventy-nine".