25289797 has 4 divisors (see below), whose sum is σ = 27235180. Its totient is φ = 23344416.

The previous prime is 25289791. The next prime is 25289801. The reversal of 25289797 is 79798252.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 10536516 + 14753281 = 3246^2 + 3841^2 .

It is a cyclic number.

It is not a de Polignac number, because 25289797 - 2¹¹ = 25287749 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 25289797.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25289791) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 972672 + ... + 972697.

It is an arithmetic number, because the mean of its divisors is an integer number (6808795).

Almost surely, 2^25289797 is an apocalyptic number.

It is an amenable number.

25289797 is a deficient number, since it is larger than the sum of its proper divisors (1945383).

25289797 is a wasteful number, since it uses less digits than its factorization.

25289797 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1945382.

The product of its digits is 635040, while the sum is 49.

The square root of 25289797 is about 5028.8962009570. The cubic root of 25289797 is about 293.5272648650.

The spelling of 25289797 in words is "twenty-five million, two hundred eighty-nine thousand, seven hundred ninety-seven".