13935643 has 4 divisors (see below), whose sum is σ = 14312320. Its totient is φ = 13558968.

The previous prime is 13935611. The next prime is 13935659. The reversal of 13935643 is 34653931.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34653931 = 13 ⋅2665687.

It is a cyclic number.

It is not a de Polignac number, because 13935643 - 2⁵ = 13935611 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13935599 and 13935608.

It is not an unprimeable number, because it can be changed into a prime (13935143) 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, 188283 + ... + 188356.

It is an arithmetic number, because the mean of its divisors is an integer number (3578080).

Almost surely, 2^13935643 is an apocalyptic number.

13935643 is a deficient number, since it is larger than the sum of its proper divisors (376677).

13935643 is an equidigital number, since it uses as much as digits as its factorization.

13935643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 376676.

The product of its digits is 29160, while the sum is 34.

The square root of 13935643 is about 3733.0474146466. The cubic root of 13935643 is about 240.6443506786.

The spelling of 13935643 in words is "thirteen million, nine hundred thirty-five thousand, six hundred forty-three".