25029989 has 4 divisors (see below), whose sum is σ = 25837440. Its totient is φ = 24222540.

The previous prime is 25029959. The next prime is 25030013. The reversal of 25029989 is 98992052.

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 25029989 - 2⁸ = 25029733 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 (25029959) 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, 403679 + ... + 403740.

It is an arithmetic number, because the mean of its divisors is an integer number (6459360).

Almost surely, 2^25029989 is an apocalyptic number.

It is an amenable number.

25029989 is a deficient number, since it is larger than the sum of its proper divisors (807451).

25029989 is an equidigital number, since it uses as much as digits as its factorization.

25029989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 807450.

The product of its (nonzero) digits is 116640, while the sum is 44.

The square root of 25029989 is about 5002.9980011989. The cubic root of 25029989 is about 292.5186449264.

The spelling of 25029989 in words is "twenty-five million, twenty-nine thousand, nine hundred eighty-nine".