25005689 has 2 divisors, whose sum is σ = 25005690. Its totient is φ = 25005688.

The previous prime is 25005679. The next prime is 25005697. The reversal of 25005689 is 98650052.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22250089 + 2755600 = 4717^2 + 1660^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25005689 is a prime.

It is not a weakly prime, because it can be changed into another prime (25005649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12502844 + 12502845.

It is an arithmetic number, because the mean of its divisors is an integer number (12502845).

Almost surely, 2^25005689 is an apocalyptic number.

It is an amenable number.

25005689 is a deficient number, since it is larger than the sum of its proper divisors (1).

25005689 is an equidigital number, since it uses as much as digits as its factorization.

25005689 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 21600, while the sum is 35.

The square root of 25005689 is about 5000.5688676390. The cubic root of 25005689 is about 292.4239517883.

The spelling of 25005689 in words is "twenty-five million, five thousand, six hundred eighty-nine".