25389897 has 16 divisors (see below), whose sum is σ = 36671040. Its totient is φ = 15532992.

The previous prime is 25389887. The next prime is 25389919. The reversal of 25389897 is 79898352.

It is not a de Polignac number, because 25389897 - 2²⁰ = 24341321 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25389817) 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, 5163 + ... + 8799.

It is an arithmetic number, because the mean of its divisors is an integer number (2291940).

Almost surely, 2^25389897 is an apocalyptic number.

It is an amenable number.

25389897 is a deficient number, since it is larger than the sum of its proper divisors (11281143).

25389897 is a wasteful number, since it uses less digits than its factorization.

25389897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3832.

The product of its digits is 1088640, while the sum is 51.

The square root of 25389897 is about 5038.8388543394. The cubic root of 25389897 is about 293.9140268771.

The spelling of 25389897 in words is "twenty-five million, three hundred eighty-nine thousand, eight hundred ninety-seven".