25638897 has 16 divisors (see below), whose sum is σ = 34836480. Its totient is φ = 16770000.

The previous prime is 25638889. The next prime is 25638911. The reversal of 25638897 is 79883652.

It is not a de Polignac number, because 25638897 - 2³ = 25638889 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25638827) 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, 59272 + ... + 59702.

It is an arithmetic number, because the mean of its divisors is an integer number (2177280).

Almost surely, 2^25638897 is an apocalyptic number.

It is an amenable number.

25638897 is a deficient number, since it is larger than the sum of its proper divisors (9197583).

25638897 is a wasteful number, since it uses less digits than its factorization.

25638897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 764.

The product of its digits is 725760, while the sum is 48.

The square root of 25638897 is about 5063.4866445958. The cubic root of 25638897 is about 294.8717128685.

The spelling of 25638897 in words is "twenty-five million, six hundred thirty-eight thousand, eight hundred ninety-seven".