13549689 has 6 divisors (see below), whose sum is σ = 19571786. Its totient is φ = 9033120.

The previous prime is 13549651. The next prime is 13549693. The reversal of 13549689 is 98694531.

It is a happy number.

13549689 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 9000000 + 4549689 = 3000^2 + 2133^2 .

It is not a de Polignac number, because 13549689 - 2¹¹ = 13547641 is a prime.

It is a super-3 number, since 3×13549689³ (a number of 22 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13549619) 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, 752752 + ... + 752769.

Almost surely, 2^13549689 is an apocalyptic number.

It is an amenable number.

13549689 is a deficient number, since it is larger than the sum of its proper divisors (6022097).

13549689 is a wasteful number, since it uses less digits than its factorization.

13549689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1505527 (or 1505524 counting only the distinct ones).

The product of its digits is 233280, while the sum is 45.

The square root of 13549689 is about 3680.9902200359. The cubic root of 13549689 is about 238.4019348164.

The spelling of 13549689 in words is "thirteen million, five hundred forty-nine thousand, six hundred eighty-nine".