13939873 has 4 divisors (see below), whose sum is σ = 14028820. Its totient is φ = 13850928.

The previous prime is 13939859. The next prime is 13939943. The reversal of 13939873 is 37893931.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 37893931 = 307 ⋅123433.

It can be written as a sum of positive squares in 2 ways, for example, as 8958049 + 4981824 = 2993^2 + 2232^2 .

It is a cyclic number.

It is not a de Polignac number, because 13939873 - 2⁹ = 13939361 is a prime.

It is a super-2 number, since 2×13939873² = 388640118512258, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13939273) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44238 + ... + 44551.

It is an arithmetic number, because the mean of its divisors is an integer number (3507205).

Almost surely, 2^13939873 is an apocalyptic number.

It is an amenable number.

13939873 is a deficient number, since it is larger than the sum of its proper divisors (88947).

13939873 is an equidigital number, since it uses as much as digits as its factorization.

13939873 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88946.

The product of its digits is 122472, while the sum is 43.

The square root of 13939873 is about 3733.6139329074. The cubic root of 13939873 is about 240.6686964665.

The spelling of 13939873 in words is "thirteen million, nine hundred thirty-nine thousand, eight hundred seventy-three".