13239943 has 2 divisors, whose sum is σ = 13239944. Its totient is φ = 13239942.

The previous prime is 13239931. The next prime is 13239949. The reversal of 13239943 is 34993231.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13239943 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 13239899 and 13239908.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13239949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6619971 + 6619972.

It is an arithmetic number, because the mean of its divisors is an integer number (6619972).

Almost surely, 2^13239943 is an apocalyptic number.

13239943 is a deficient number, since it is larger than the sum of its proper divisors (1).

13239943 is an equidigital number, since it uses as much as digits as its factorization.

13239943 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17496, while the sum is 34.

The square root of 13239943 is about 3638.6732472153. The cubic root of 13239943 is about 236.5712902291.

The spelling of 13239943 in words is "thirteen million, two hundred thirty-nine thousand, nine hundred forty-three".