25389697 has 6 divisors (see below), whose sum is σ = 25636758. Its totient is φ = 25144992.

The previous prime is 25389691. The next prime is 25389739. The reversal of 25389697 is 79698352.

It can be written as a sum of positive squares in 3 ways, for example, as 2359296 + 23030401 = 1536^2 + 4799^2 .

It is a de Polignac number, because none of the positive numbers 2^k-25389697 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 25389697.

It is not an unprimeable number, because it can be changed into a prime (25389691) 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, 10813 + ... + 12949.

It is an arithmetic number, because the mean of its divisors is an integer number (4272793).

Almost surely, 2^25389697 is an apocalyptic number.

It is an amenable number.

25389697 is a deficient number, since it is larger than the sum of its proper divisors (247061).

25389697 is an equidigital number, since it uses as much as digits as its factorization.

25389697 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2355 (or 2246 counting only the distinct ones).

The product of its digits is 816480, while the sum is 49.

The square root of 25389697 is about 5038.8190084582. The cubic root of 25389697 is about 293.9132551402.

The spelling of 25389697 in words is "twenty-five million, three hundred eighty-nine thousand, six hundred ninety-seven".