25440199 has 2 divisors, whose sum is σ = 25440200. Its totient is φ = 25440198.

The previous prime is 25440193. The next prime is 25440229. The reversal of 25440199 is 99104452.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25440199 - 2⁵ = 25440167 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25440193) 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 as a sum of consecutive naturals, namely, 12720099 + 12720100.

It is an arithmetic number, because the mean of its divisors is an integer number (12720100).

Almost surely, 2^25440199 is an apocalyptic number.

25440199 is a deficient number, since it is larger than the sum of its proper divisors (1).

25440199 is an equidigital number, since it uses as much as digits as its factorization.

25440199 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12960, while the sum is 34.

The square root of 25440199 is about 5043.8278122870. The cubic root of 25440199 is about 294.1079978693.

The spelling of 25440199 in words is "twenty-five million, four hundred forty thousand, one hundred ninety-nine".