2391239 has 2 divisors, whose sum is σ = 2391240. Its totient is φ = 2391238.

The previous prime is 2391227. The next prime is 2391269. The reversal of 2391239 is 9321932.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2391239 - 2¹⁶ = 2325703 is a prime.

It is a Chen prime.

It is equal to p₁₇₅₇₀₉ and since 2391239 and 175709 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2391269) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1195619 + 1195620.

It is an arithmetic number, because the mean of its divisors is an integer number (1195620).

2^2391239 is an apocalyptic number.

2391239 is a deficient number, since it is larger than the sum of its proper divisors (1).

2391239 is an equidigital number, since it uses as much as digits as its factorization.

2391239 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2916, while the sum is 29.

The square root of 2391239 is about 1546.3631526909. The cubic root of 2391239 is about 133.7234774323.

The spelling of 2391239 in words is "two million, three hundred ninety-one thousand, two hundred thirty-nine".