25235909 has 2 divisors, whose sum is σ = 25235910. Its totient is φ = 25235908.

The previous prime is 25235863. The next prime is 25235923. The reversal of 25235909 is 90953252.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22420225 + 2815684 = 4735^2 + 1678^2 .

It is a cyclic number.

It is not a de Polignac number, because 25235909 - 2⁸ = 25235653 is a prime.

It is a super-2 number, since 2×25235909² = 1273702206112562, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25235929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12617954 + 12617955.

It is an arithmetic number, because the mean of its divisors is an integer number (12617955).

Almost surely, 2^25235909 is an apocalyptic number.

It is an amenable number.

25235909 is a deficient number, since it is larger than the sum of its proper divisors (1).

25235909 is an equidigital number, since it uses as much as digits as its factorization.

25235909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24300, while the sum is 35.

The square root of 25235909 is about 5023.5355079864. The cubic root of 25235909 is about 293.3186320398.

The spelling of 25235909 in words is "twenty-five million, two hundred thirty-five thousand, nine hundred nine".