25890109 has 8 divisors (see below), whose sum is σ = 29664320. Its totient is φ = 22134816.

The previous prime is 25890101. The next prime is 25890119. The reversal of 25890109 is 90109852.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 25890109 - 2³ = 25890101 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25890101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1659 + ... + 7384.

It is an arithmetic number, because the mean of its divisors is an integer number (3708040).

Almost surely, 2^25890109 is an apocalyptic number.

It is an amenable number.

25890109 is a deficient number, since it is larger than the sum of its proper divisors (3774211).

25890109 is an equidigital number, since it uses as much as digits as its factorization.

25890109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9459.

The product of its (nonzero) digits is 6480, while the sum is 34.

The square root of 25890109 is about 5088.2324042834. The cubic root of 25890109 is about 295.8316435179.

The spelling of 25890109 in words is "twenty-five million, eight hundred ninety thousand, one hundred nine".