25158989 has 4 divisors (see below), whose sum is σ = 25177824. Its totient is φ = 25140156.

The previous prime is 25158971. The next prime is 25159003. The reversal of 25158989 is 98985152.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 25158989 - 2⁸ = 25158733 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25158919) 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 3 ways as a sum of consecutive naturals, for example, 7247 + ... + 10140.

It is an arithmetic number, because the mean of its divisors is an integer number (6294456).

Almost surely, 2^25158989 is an apocalyptic number.

It is an amenable number.

25158989 is a deficient number, since it is larger than the sum of its proper divisors (18835).

25158989 is a wasteful number, since it uses less digits than its factorization.

25158989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18834.

The product of its digits is 259200, while the sum is 47.

The square root of 25158989 is about 5015.8737025567. The cubic root of 25158989 is about 293.0203133303.

The spelling of 25158989 in words is "twenty-five million, one hundred fifty-eight thousand, nine hundred eighty-nine".