25288919 has 2 divisors, whose sum is σ = 25288920. Its totient is φ = 25288918.

The previous prime is 25288909. The next prime is 25288931. The reversal of 25288919 is 91988252.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25288919 is a prime.

It is a super-2 number, since 2×25288919² = 1279058848377122, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 25288919.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25288909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12644459 + 12644460.

It is an arithmetic number, because the mean of its divisors is an integer number (12644460).

Almost surely, 2^25288919 is an apocalyptic number.

25288919 is a deficient number, since it is larger than the sum of its proper divisors (1).

25288919 is an equidigital number, since it uses as much as digits as its factorization.

25288919 is an evil number, because the sum of its binary digits is even.

The product of its digits is 103680, while the sum is 44.

The square root of 25288919 is about 5028.8089047010. The cubic root of 25288919 is about 293.5238679757.

The spelling of 25288919 in words is "twenty-five million, two hundred eighty-eight thousand, nine hundred nineteen".