25653897 has 6 divisors (see below), whose sum is σ = 37055642. Its totient is φ = 17102592.

The previous prime is 25653883. The next prime is 25653911. The reversal of 25653897 is 79835652.

It is a happy number.

25653897 is a `hidden beast` number, since 2 + 565 + 3 + 89 + 7 = 666.

It is an interprime number because it is at equal distance from previous prime (25653883) and next prime (25653911).

It can be written as a sum of positive squares in only one way, i.e., 25644096 + 9801 = 5064^2 + 99^2 .

It is not a de Polignac number, because 25653897 - 2⁷ = 25653769 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25653827) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1425208 + ... + 1425225.

Almost surely, 2^25653897 is an apocalyptic number.

It is an amenable number.

25653897 is a deficient number, since it is larger than the sum of its proper divisors (11401745).

25653897 is a wasteful number, since it uses less digits than its factorization.

25653897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2850439 (or 2850436 counting only the distinct ones).

The product of its digits is 453600, while the sum is 45.

The square root of 25653897 is about 5064.9676208244. The cubic root of 25653897 is about 294.9292064157.

The spelling of 25653897 in words is "twenty-five million, six hundred fifty-three thousand, eight hundred ninety-seven".