25049989 has 4 divisors (see below), whose sum is σ = 25060000. Its totient is φ = 25039980.

The previous prime is 25049977. The next prime is 25050001. The reversal of 25049989 is 98994052.

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, and also a brilliant number, because the two primes have the same length.

It is an interprime number because it is at equal distance from previous prime (25049977) and next prime (25050001).

It is a cyclic number.

It is not a de Polignac number, because 25049989 - 2⁵ = 25049957 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25049389) 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, 2494 + ... + 7504.

It is an arithmetic number, because the mean of its divisors is an integer number (6265000).

Almost surely, 2^25049989 is an apocalyptic number.

It is an amenable number.

25049989 is a deficient number, since it is larger than the sum of its proper divisors (10011).

25049989 is an equidigital number, since it uses as much as digits as its factorization.

25049989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10010.

The product of its (nonzero) digits is 233280, while the sum is 46.

The square root of 25049989 is about 5004.9964035951. The cubic root of 25049989 is about 292.5965356965.

The spelling of 25049989 in words is "twenty-five million, forty-nine thousand, nine hundred eighty-nine".