25961189 has 2 divisors, whose sum is σ = 25961190. Its totient is φ = 25961188.

The previous prime is 25961179. The next prime is 25961191. The reversal of 25961189 is 98116952.

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., 21696964 + 4264225 = 4658^2 + 2065^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25961189 is a prime.

Together with 25961191, 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 (25961179) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12980594 + 12980595.

It is an arithmetic number, because the mean of its divisors is an integer number (12980595).

Almost surely, 2^25961189 is an apocalyptic number.

It is an amenable number.

25961189 is a deficient number, since it is larger than the sum of its proper divisors (1).

25961189 is an equidigital number, since it uses as much as digits as its factorization.

25961189 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 38880, while the sum is 41.

The square root of 25961189 is about 5095.2123606382. The cubic root of 25961189 is about 296.1021264657.

The spelling of 25961189 in words is "twenty-five million, nine hundred sixty-one thousand, one hundred eighty-nine".