13825989 has 6 divisors (see below), whose sum is σ = 19970886. Its totient is φ = 9217320.

The previous prime is 13825963. The next prime is 13825993. The reversal of 13825989 is 98952831.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 12723489 + 1102500 = 3567^2 + 1050^2 .

It is not a de Polignac number, because 13825989 - 2⁵ = 13825957 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13825909) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 768102 + ... + 768119.

It is an arithmetic number, because the mean of its divisors is an integer number (3328481).

Almost surely, 2^13825989 is an apocalyptic number.

It is an amenable number.

13825989 is a deficient number, since it is larger than the sum of its proper divisors (6144897).

13825989 is a wasteful number, since it uses less digits than its factorization.

13825989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1536227 (or 1536224 counting only the distinct ones).

The product of its digits is 155520, while the sum is 45.

The square root of 13825989 is about 3718.3314806510. The cubic root of 13825989 is about 240.0115098647.

The spelling of 13825989 in words is "thirteen million, eight hundred twenty-five thousand, nine hundred eighty-nine".