13939943 has 2 divisors, whose sum is σ = 13939944. Its totient is φ = 13939942.

The previous prime is 13939859. The next prime is 13939951. The reversal of 13939943 is 34993931.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 13939943 - 2¹⁰ = 13938919 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 13939943.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13939973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6969971 + 6969972.

It is an arithmetic number, because the mean of its divisors is an integer number (6969972).

Almost surely, 2^13939943 is an apocalyptic number.

13939943 is a deficient number, since it is larger than the sum of its proper divisors (1).

13939943 is an equidigital number, since it uses as much as digits as its factorization.

13939943 is an evil number, because the sum of its binary digits is even.

The product of its digits is 78732, while the sum is 41.

The square root of 13939943 is about 3733.6233071910. The cubic root of 13939943 is about 240.6690993105.

The spelling of 13939943 in words is "thirteen million, nine hundred thirty-nine thousand, nine hundred forty-three".