25089661 has 2 divisors, whose sum is σ = 25089662. Its totient is φ = 25089660.

The previous prime is 25089641. The next prime is 25089679. The reversal of 25089661 is 16698052.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13461561 + 11628100 = 3669^2 + 3410^2 .

It is a cyclic number.

It is not a de Polignac number, because 25089661 - 2⁹ = 25089149 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 25089661.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25089601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12544830 + 12544831.

It is an arithmetic number, because the mean of its divisors is an integer number (12544831).

Almost surely, 2^25089661 is an apocalyptic number.

It is an amenable number.

25089661 is a deficient number, since it is larger than the sum of its proper divisors (1).

25089661 is an equidigital number, since it uses as much as digits as its factorization.

25089661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25920, while the sum is 37.

The square root of 25089661 is about 5008.9580752887. The cubic root of 25089661 is about 292.7509172320.

The spelling of 25089661 in words is "twenty-five million, eighty-nine thousand, six hundred sixty-one".