2123879 has 2 divisors, whose sum is σ = 2123880. Its totient is φ = 2123878.

The previous prime is 2123867. The next prime is 2123881. The reversal of 2123879 is 9783212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2123879 - 2¹² = 2119783 is a prime.

It is a Sophie Germain prime.

Together with 2123881, 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 (2123279) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1061939 + 1061940.

It is an arithmetic number, because the mean of its divisors is an integer number (1061940).

2^2123879 is an apocalyptic number.

2123879 is a deficient number, since it is larger than the sum of its proper divisors (1).

2123879 is an equidigital number, since it uses as much as digits as its factorization.

2123879 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6048, while the sum is 32.

The square root of 2123879 is about 1457.3534231613. The cubic root of 2123879 is about 128.5414684454.

The spelling of 2123879 in words is "two million, one hundred twenty-three thousand, eight hundred seventy-nine".