13881705 has 8 divisors (see below), whose sum is σ = 22210752. Its totient is φ = 7403568.

The previous prime is 13881701. The next prime is 13881713. The reversal of 13881705 is 50718831.

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

It is not a de Polignac number, because 13881705 - 2² = 13881701 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13881701) 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, 462709 + ... + 462738.

It is an arithmetic number, because the mean of its divisors is an integer number (2776344).

Almost surely, 2^13881705 is an apocalyptic number.

13881705 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

13881705 is a deficient number, since it is larger than the sum of its proper divisors (8329047).

13881705 is an equidigital number, since it uses as much as digits as its factorization.

13881705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 925455.

The product of its (nonzero) digits is 6720, while the sum is 33.

The square root of 13881705 is about 3725.8160180020. The cubic root of 13881705 is about 240.3334773944. Note that the first 3 decimals are identical.

The spelling of 13881705 in words is "thirteen million, eight hundred eighty-one thousand, seven hundred five".