13931943 has 16 divisors (see below), whose sum is σ = 19186656. Its totient is φ = 8985600.

The previous prime is 13931933. The next prime is 13931987. The reversal of 13931943 is 34913931.

It is not a de Polignac number, because 13931943 - 2¹⁰ = 13930919 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13931933) 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 15 ways as a sum of consecutive naturals, for example, 34543 + ... + 34943.

It is an arithmetic number, because the mean of its divisors is an integer number (1199166).

Almost surely, 2^13931943 is an apocalyptic number.

13931943 is a deficient number, since it is larger than the sum of its proper divisors (5254713).

13931943 is a wasteful number, since it uses less digits than its factorization.

13931943 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 754.

The product of its digits is 8748, while the sum is 33.

The square root of 13931943 is about 3732.5518080798. The cubic root of 13931943 is about 240.6230512689.

The spelling of 13931943 in words is "thirteen million, nine hundred thirty-one thousand, nine hundred forty-three".