25695009 has 16 divisors (see below), whose sum is σ = 38463040. Its totient is φ = 16951680.

The previous prime is 25694993. The next prime is 25695029. The reversal of 25695009 is 90059652.

It is not a de Polignac number, because 25695009 - 2⁴ = 25694993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25695029) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2287 + ... + 7524.

It is an arithmetic number, because the mean of its divisors is an integer number (2403940).

Almost surely, 2^25695009 is an apocalyptic number.

It is an amenable number.

25695009 is a deficient number, since it is larger than the sum of its proper divisors (12768031).

25695009 is an equidigital number, since it uses as much as digits as its factorization.

25695009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9917 (or 9911 counting only the distinct ones).

The product of its (nonzero) digits is 24300, while the sum is 36.

The square root of 25695009 is about 5069.0244623596. The cubic root of 25695009 is about 295.0866699282.

The spelling of 25695009 in words is "twenty-five million, six hundred ninety-five thousand, nine".