13541989 has 4 divisors (see below), whose sum is σ = 13549356. Its totient is φ = 13534624.

The previous prime is 13541981. The next prime is 13541993. The reversal of 13541989 is 98914531.

13541989 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 98914531 = 389 ⋅254279.

It can be written as a sum of positive squares in 2 ways, for example, as 7064964 + 6477025 = 2658^2 + 2545^2 .

It is a cyclic number.

It is not a de Polignac number, because 13541989 - 2³ = 13541981 is a prime.

It is a super-2 number, since 2×13541989² = 366770932152242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13541981) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1617 + ... + 5449.

It is an arithmetic number, because the mean of its divisors is an integer number (3387339).

Almost surely, 2^13541989 is an apocalyptic number.

It is an amenable number.

13541989 is a deficient number, since it is larger than the sum of its proper divisors (7367).

13541989 is an equidigital number, since it uses as much as digits as its factorization.

13541989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7366.

The product of its digits is 38880, while the sum is 40.

The square root of 13541989 is about 3679.9441571850. The cubic root of 13541989 is about 238.3567666767.

It can be divided in two parts, 135 and 41989, that added together give a palindrome (42124).

The spelling of 13541989 in words is "thirteen million, five hundred forty-one thousand, nine hundred eighty-nine".