25289663 has 4 divisors (see below), whose sum is σ = 28902480. Its totient is φ = 21676848.

The previous prime is 25289651. The next prime is 25289683. The reversal of 25289663 is 36698252.

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

It is a cyclic number.

It is not a de Polignac number, because 25289663 - 2⁴ = 25289647 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 25289663.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25289623) 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, 1806398 + ... + 1806411.

It is an arithmetic number, because the mean of its divisors is an integer number (7225620).

Almost surely, 2^25289663 is an apocalyptic number.

25289663 is a deficient number, since it is larger than the sum of its proper divisors (3612817).

25289663 is an equidigital number, since it uses as much as digits as its factorization.

25289663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3612816.

The product of its digits is 155520, while the sum is 41.

The square root of 25289663 is about 5028.8828779362. The cubic root of 25289663 is about 293.5267464382.

It can be divided in two parts, 25289 and 663, that added together give a palindrome (25952).

The spelling of 25289663 in words is "twenty-five million, two hundred eighty-nine thousand, six hundred sixty-three".