13945543 has 2 divisors, whose sum is σ = 13945544. Its totient is φ = 13945542.

The previous prime is 13945541. The next prime is 13945571. The reversal of 13945543 is 34554931.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 13945543 - 2¹ = 13945541 is a prime.

Together with 13945541, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 13945499 and 13945508.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13945541) 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 as a sum of consecutive naturals, namely, 6972771 + 6972772.

It is an arithmetic number, because the mean of its divisors is an integer number (6972772).

Almost surely, 2^13945543 is an apocalyptic number.

13945543 is a deficient number, since it is larger than the sum of its proper divisors (1).

13945543 is an equidigital number, since it uses as much as digits as its factorization.

13945543 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 32400, while the sum is 34.

The square root of 13945543 is about 3734.3731736397. The cubic root of 13945543 is about 240.7013224581.

The spelling of 13945543 in words is "thirteen million, nine hundred forty-five thousand, five hundred forty-three".