25890089 has 4 divisors (see below), whose sum is σ = 25924356. Its totient is φ = 25855824.

The previous prime is 25890083. The next prime is 25890097. The reversal of 25890089 is 98009852.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 15936064 + 9954025 = 3992^2 + 3155^2 .

It is a cyclic number.

It is not a de Polignac number, because 25890089 - 2²⁰ = 24841513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25890083) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15974 + ... + 17519.

It is an arithmetic number, because the mean of its divisors is an integer number (6481089).

Almost surely, 2^25890089 is an apocalyptic number.

It is an amenable number.

25890089 is a deficient number, since it is larger than the sum of its proper divisors (34267).

25890089 is an equidigital number, since it uses as much as digits as its factorization.

25890089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34266.

The product of its (nonzero) digits is 51840, while the sum is 41.

The square root of 25890089 is about 5088.2304389640. The cubic root of 25890089 is about 295.8315673416.

The spelling of 25890089 in words is "twenty-five million, eight hundred ninety thousand, eighty-nine".