13881643 has 8 divisors (see below), whose sum is σ = 14144000. Its totient is φ = 13621608.

The previous prime is 13881641. The next prime is 13881649. The reversal of 13881643 is 34618831.

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

It is a cyclic number.

It is not a de Polignac number, because 13881643 - 2¹ = 13881641 is a prime.

It is a super-3 number, since 3×13881643³ (a number of 22 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13881599 and 13881608.

It is not an unprimeable number, because it can be changed into a prime (13881641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15280 + ... + 16162.

It is an arithmetic number, because the mean of its divisors is an integer number (1768000).

Almost surely, 2^13881643 is an apocalyptic number.

13881643 is a deficient number, since it is larger than the sum of its proper divisors (262357).

13881643 is an equidigital number, since it uses as much as digits as its factorization.

13881643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1161.

The product of its digits is 13824, while the sum is 34.

The square root of 13881643 is about 3725.8076976677. The cubic root of 13881643 is about 240.3331195926. Note that the first 3 decimals are identical.

The spelling of 13881643 in words is "thirteen million, eight hundred eighty-one thousand, six hundred forty-three".