2513309 has 2 divisors, whose sum is σ = 2513310. Its totient is φ = 2513308.

The previous prime is 2513293. The next prime is 2513311. The reversal of 2513309 is 9033152.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1747684 + 765625 = 1322^2 + 875^2 .

It is a cyclic number.

It is not a de Polignac number, because 2513309 - 2⁴ = 2513293 is a prime.

Together with 2513311, 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 (2513209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1256654 + 1256655.

It is an arithmetic number, because the mean of its divisors is an integer number (1256655).

2^2513309 is an apocalyptic number.

It is an amenable number.

2513309 is a deficient number, since it is larger than the sum of its proper divisors (1).

2513309 is an equidigital number, since it uses as much as digits as its factorization.

2513309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 810, while the sum is 23.

The square root of 2513309 is about 1585.3419189563. The cubic root of 2513309 is about 135.9612959356.

The spelling of 2513309 in words is "two million, five hundred thirteen thousand, three hundred nine".