13899543 has 8 divisors (see below), whose sum is σ = 21180288. Its totient is φ = 7942584.

The previous prime is 13899539. The next prime is 13899547. The reversal of 13899543 is 34599831.

13899543 is digitally balanced in base 2 and base 8, because in such bases it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (13899539) and next prime (13899547).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 13899543 - 2² = 13899539 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

13899543 is strictly pandigital in base 8.

It is a junction number, because it is equal to n+sod(n) for n = 13899495 and 13899504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13899547) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 330921 + ... + 330962.

It is an arithmetic number, because the mean of its divisors is an integer number (2647536).

Almost surely, 2^13899543 is an apocalyptic number.

13899543 is a deficient number, since it is larger than the sum of its proper divisors (7280745).

13899543 is an equidigital number, since it uses as much as digits as its factorization.

13899543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 661893.

The product of its digits is 116640, while the sum is 42.

The square root of 13899543 is about 3728.2090874842. The cubic root of 13899543 is about 240.4363762238.

It can be divided in two parts, 138 and 99543, that added together give a triangular number (99681 = T₄₄₆).

The spelling of 13899543 in words is "thirteen million, eight hundred ninety-nine thousand, five hundred forty-three".