2309640539 has 2 divisors, whose sum is σ = 2309640540. Its totient is φ = 2309640538.

The previous prime is 2309640521. The next prime is 2309640547. The reversal of 2309640539 is 9350469032.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2309640539 - 2²⁸ = 2041205083 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2309640496 and 2309640505.

It is not a weakly prime, because it can be changed into another prime (2309640139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1154820269 + 1154820270.

It is an arithmetic number, because the mean of its divisors is an integer number (1154820270).

Almost surely, 2^2309640539 is an apocalyptic number.

2309640539 is a deficient number, since it is larger than the sum of its proper divisors (1).

2309640539 is an equidigital number, since it uses as much as digits as its factorization.

2309640539 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 174960, while the sum is 41.

The square root of 2309640539 is about 48058.7196978863. The cubic root of 2309640539 is about 1321.8478365608.

The spelling of 2309640539 in words is "two billion, three hundred nine million, six hundred forty thousand, five hundred thirty-nine".