25663369 has 8 divisors (see below), whose sum is σ = 26120520. Its totient is φ = 25209216.

The previous prime is 25663361. The next prime is 25663373. The reversal of 25663369 is 96336652.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 783225 + 24880144 = 885^2 + 4988^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 25663369 - 2³ = 25663361 is a prime.

It is a super-2 number, since 2×25663369² = 1317217016860322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25663361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22587 + ... + 23695.

It is an arithmetic number, because the mean of its divisors is an integer number (3265065).

Almost surely, 2^25663369 is an apocalyptic number.

It is an amenable number.

25663369 is a deficient number, since it is larger than the sum of its proper divisors (457151).

25663369 is a wasteful number, since it uses less digits than its factorization.

25663369 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1499.

The product of its digits is 174960, while the sum is 40.

The square root of 25663369 is about 5065.9025849300. The cubic root of 25663369 is about 294.9655001309.

The spelling of 25663369 in words is "twenty-five million, six hundred sixty-three thousand, three hundred sixty-nine".