13811289 has 4 divisors (see below), whose sum is σ = 18415056. Its totient is φ = 9207524.

The previous prime is 13811269. The next prime is 13811297. The reversal of 13811289 is 98211831.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 98211831 = 3 ⋅32737277.

It is a cyclic number.

It is not a de Polignac number, because 13811289 - 2¹⁷ = 13680217 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (13811209) 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, 2301879 + ... + 2301884.

It is an arithmetic number, because the mean of its divisors is an integer number (4603764).

Almost surely, 2^13811289 is an apocalyptic number.

It is an amenable number.

13811289 is a deficient number, since it is larger than the sum of its proper divisors (4603767).

13811289 is an equidigital number, since it uses as much as digits as its factorization.

13811289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4603766.

The product of its digits is 3456, while the sum is 33.

The square root of 13811289 is about 3716.3542619078. The cubic root of 13811289 is about 239.9264184152.

The spelling of 13811289 in words is "thirteen million, eight hundred eleven thousand, two hundred eighty-nine".