25492989 has 8 divisors (see below), whose sum is σ = 34062400. Its totient is φ = 16959456.

The previous prime is 25492969. The next prime is 25492991. The reversal of 25492989 is 98929452.

It is a happy number.

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

It is a de Polignac number, because none of the positive numbers 2^k-25492989 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25492919) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7264 + ... + 10185.

It is an arithmetic number, because the mean of its divisors is an integer number (4257800).

Almost surely, 2^25492989 is an apocalyptic number.

It is an amenable number.

25492989 is a deficient number, since it is larger than the sum of its proper divisors (8569411).

25492989 is a wasteful number, since it uses less digits than its factorization.

25492989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17939.

The product of its digits is 466560, while the sum is 48.

The square root of 25492989 is about 5049.0582290166. The cubic root of 25492989 is about 294.3112881352.

The spelling of 25492989 in words is "twenty-five million, four hundred ninety-two thousand, nine hundred eighty-nine".