25992689 has 2 divisors, whose sum is σ = 25992690. Its totient is φ = 25992688.

The previous prime is 25992667. The next prime is 25992719. The reversal of 25992689 is 98629952.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21086464 + 4906225 = 4592^2 + 2215^2 .

It is a cyclic number.

It is not a de Polignac number, because 25992689 - 2⁸ = 25992433 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (25992619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12996344 + 12996345.

It is an arithmetic number, because the mean of its divisors is an integer number (12996345).

Almost surely, 2^25992689 is an apocalyptic number.

It is an amenable number.

25992689 is a deficient number, since it is larger than the sum of its proper divisors (1).

25992689 is an equidigital number, since it uses as much as digits as its factorization.

25992689 is an evil number, because the sum of its binary digits is even.

The product of its digits is 699840, while the sum is 50.

The square root of 25992689 is about 5098.3025606568. The cubic root of 25992689 is about 296.2218365341.

The spelling of 25992689 in words is "twenty-five million, nine hundred ninety-two thousand, six hundred eighty-nine".