25253309 has 2 divisors, whose sum is σ = 25253310. Its totient is φ = 25253308.

The previous prime is 25253297. The next prime is 25253311. The reversal of 25253309 is 90335252.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21132409 + 4120900 = 4597^2 + 2030^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25253309 is a prime.

Together with 25253311, 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 (25253369) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12626654 + 12626655.

It is an arithmetic number, because the mean of its divisors is an integer number (12626655).

Almost surely, 2^25253309 is an apocalyptic number.

It is an amenable number.

25253309 is a deficient number, since it is larger than the sum of its proper divisors (1).

25253309 is an equidigital number, since it uses as much as digits as its factorization.

25253309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8100, while the sum is 29.

The square root of 25253309 is about 5025.2670575801. The cubic root of 25253309 is about 293.3860303339.

The spelling of 25253309 in words is "twenty-five million, two hundred fifty-three thousand, three hundred nine".