2639239 has 2 divisors, whose sum is σ = 2639240. Its totient is φ = 2639238.

The previous prime is 2639213. The next prime is 2639251. The reversal of 2639239 is 9329362.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2639239 - 2⁵ = 2639207 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2639339) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1319619 + 1319620.

It is an arithmetic number, because the mean of its divisors is an integer number (1319620).

2^2639239 is an apocalyptic number.

2639239 is a deficient number, since it is larger than the sum of its proper divisors (1).

2639239 is an equidigital number, since it uses as much as digits as its factorization.

2639239 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 17496, while the sum is 34.

The square root of 2639239 is about 1624.5734824870. The cubic root of 2639239 is about 138.1951834450.

The spelling of 2639239 in words is "two million, six hundred thirty-nine thousand, two hundred thirty-nine".