25039989 has 16 divisors (see below), whose sum is σ = 39950400. Its totient is φ = 15409008.

The previous prime is 25039961. The next prime is 25039999. The reversal of 25039989 is 98993052.

25039989 is a `hidden beast` number, since 250 + 399 + 8 + 9 = 666.

It is not a de Polignac number, because 25039989 - 2⁹ = 25039477 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25039999) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35319 + ... + 36020.

It is an arithmetic number, because the mean of its divisors is an integer number (2496900).

Almost surely, 2^25039989 is an apocalyptic number.

It is an amenable number.

25039989 is a deficient number, since it is larger than the sum of its proper divisors (14910411).

25039989 is a wasteful number, since it uses less digits than its factorization.

25039989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71361 (or 71355 counting only the distinct ones).

The product of its (nonzero) digits is 174960, while the sum is 45.

The square root of 25039989 is about 5003.9973021575. The cubic root of 25039989 is about 292.5575954959.

The spelling of 25039989 in words is "twenty-five million, thirty-nine thousand, nine hundred eighty-nine".