25493899 has 4 divisors (see below), whose sum is σ = 25853040. Its totient is φ = 25134760.

The previous prime is 25493887. The next prime is 25493903. The reversal of 25493899 is 99839452.

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 25493899 - 2¹⁵ = 25461131 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25493849) 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, 179464 + ... + 179605.

It is an arithmetic number, because the mean of its divisors is an integer number (6463260).

Almost surely, 2^25493899 is an apocalyptic number.

25493899 is a deficient number, since it is larger than the sum of its proper divisors (359141).

25493899 is an equidigital number, since it uses as much as digits as its factorization.

25493899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 359140.

The product of its digits is 699840, while the sum is 49.

The square root of 25493899 is about 5049.1483440279. The cubic root of 25493899 is about 294.3147900142.

The spelling of 25493899 in words is "twenty-five million, four hundred ninety-three thousand, eight hundred ninety-nine".