25936609 has 2 divisors, whose sum is σ = 25936610. Its totient is φ = 25936608.

The previous prime is 25936601. The next prime is 25936613. The reversal of 25936609 is 90663952.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14861025 + 11075584 = 3855^2 + 3328^2 .

It is a cyclic number.

It is not a de Polignac number, because 25936609 - 2³ = 25936601 is a prime.

It is not a weakly prime, because it can be changed into another prime (25936601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12968304 + 12968305.

It is an arithmetic number, because the mean of its divisors is an integer number (12968305).

Almost surely, 2^25936609 is an apocalyptic number.

It is an amenable number.

25936609 is a deficient number, since it is larger than the sum of its proper divisors (1).

25936609 is an equidigital number, since it uses as much as digits as its factorization.

25936609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 87480, while the sum is 40.

The square root of 25936609 is about 5092.7997211750. The cubic root of 25936609 is about 296.0086473308.

The spelling of 25936609 in words is "twenty-five million, nine hundred thirty-six thousand, six hundred nine".