13891543 has 4 divisors (see below), whose sum is σ = 13907160. Its totient is φ = 13875928.

The previous prime is 13891541. The next prime is 13891589. The reversal of 13891543 is 34519831.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 13891543 - 2¹ = 13891541 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13891499 and 13891508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13891541) 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, 6388 + ... + 8281.

It is an arithmetic number, because the mean of its divisors is an integer number (3476790).

Almost surely, 2^13891543 is an apocalyptic number.

13891543 is a deficient number, since it is larger than the sum of its proper divisors (15617).

13891543 is an equidigital number, since it uses as much as digits as its factorization.

13891543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15616.

The product of its digits is 12960, while the sum is 34.

The square root of 13891543 is about 3727.1360318615. The cubic root of 13891543 is about 240.3902389718.

The spelling of 13891543 in words is "thirteen million, eight hundred ninety-one thousand, five hundred forty-three".