25623317 has 4 divisors (see below), whose sum is σ = 25635276. Its totient is φ = 25611360.

The previous prime is 25623289. The next prime is 25623337. The reversal of 25623317 is 71332652.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 13830961 + 11792356 = 3719^2 + 3434^2 .

It is a cyclic number.

It is not a de Polignac number, because 25623317 - 2⁶ = 25623253 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 25623317.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25623337) 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, 1784 + ... + 7377.

It is an arithmetic number, because the mean of its divisors is an integer number (6408819).

Almost surely, 2^25623317 is an apocalyptic number.

It is an amenable number.

25623317 is a deficient number, since it is larger than the sum of its proper divisors (11959).

25623317 is an equidigital number, since it uses as much as digits as its factorization.

25623317 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11958.

The product of its digits is 7560, while the sum is 29.

The square root of 25623317 is about 5061.9479452084. The cubic root of 25623317 is about 294.8119724909.

Adding to 25623317 its reverse (71332652), we get a palindrome (96955969).

The spelling of 25623317 in words is "twenty-five million, six hundred twenty-three thousand, three hundred seventeen".