25799689 has 2 divisors, whose sum is σ = 25799690. Its totient is φ = 25799688.

The previous prime is 25799681. The next prime is 25799713. The reversal of 25799689 is 98699752.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19713600 + 6086089 = 4440^2 + 2467^2 .

It is a cyclic number.

It is not a de Polignac number, because 25799689 - 2³ = 25799681 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (25799681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12899844 + 12899845.

It is an arithmetic number, because the mean of its divisors is an integer number (12899845).

Almost surely, 2^25799689 is an apocalyptic number.

It is an amenable number.

25799689 is a deficient number, since it is larger than the sum of its proper divisors (1).

25799689 is an equidigital number, since it uses as much as digits as its factorization.

25799689 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2449440, while the sum is 55.

The square root of 25799689 is about 5079.3394255553. The cubic root of 25799689 is about 295.4868490668.

The spelling of 25799689 in words is "twenty-five million, seven hundred ninety-nine thousand, six hundred eighty-nine".