2539309 has 2 divisors, whose sum is σ = 2539310. Its totient is φ = 2539308.

The previous prime is 2539289. The next prime is 2539319. The reversal of 2539309 is 9039352.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2205225 + 334084 = 1485^2 + 578^2 .

It is a cyclic number.

It is not a de Polignac number, because 2539309 - 2⁷ = 2539181 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2539319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1269654 + 1269655.

It is an arithmetic number, because the mean of its divisors is an integer number (1269655).

2^2539309 is an apocalyptic number.

It is an amenable number.

2539309 is a deficient number, since it is larger than the sum of its proper divisors (1).

2539309 is an equidigital number, since it uses as much as digits as its factorization.

2539309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7290, while the sum is 31.

The square root of 2539309 is about 1593.5209443242. The cubic root of 2539309 is about 136.4285250639.

The spelling of 2539309 in words is "two million, five hundred thirty-nine thousand, three hundred nine".