25617959 has 2 divisors, whose sum is σ = 25617960. Its totient is φ = 25617958.

The previous prime is 25617953. The next prime is 25617983. The reversal of 25617959 is 95971652.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25617959 - 2⁸ = 25617703 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 (25617953) 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, 12808979 + 12808980.

It is an arithmetic number, because the mean of its divisors is an integer number (12808980).

Almost surely, 2^25617959 is an apocalyptic number.

25617959 is a deficient number, since it is larger than the sum of its proper divisors (1).

25617959 is an equidigital number, since it uses as much as digits as its factorization.

25617959 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 170100, while the sum is 44.

The square root of 25617959 is about 5061.4186746405. The cubic root of 25617959 is about 294.7914220333.

The spelling of 25617959 in words is "twenty-five million, six hundred seventeen thousand, nine hundred fifty-nine".