25204989 has 16 divisors (see below), whose sum is σ = 34200000. Its totient is φ = 16509696.

The previous prime is 25204979. The next prime is 25205023. The reversal of 25204989 is 98940252.

It is not a de Polignac number, because 25204989 - 2¹³ = 25196797 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25204909) 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, 50262 + ... + 50760.

It is an arithmetic number, because the mean of its divisors is an integer number (2137500).

Almost surely, 2^25204989 is an apocalyptic number.

It is an amenable number.

25204989 is a deficient number, since it is larger than the sum of its proper divisors (8995011).

25204989 is a wasteful number, since it uses less digits than its factorization.

25204989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 764.

The product of its (nonzero) digits is 51840, while the sum is 39.

The square root of 25204989 is about 5020.4570509068. The cubic root of 25204989 is about 293.1987880153.

The spelling of 25204989 in words is "twenty-five million, two hundred four thousand, nine hundred eighty-nine".