13906643 has 2 divisors, whose sum is σ = 13906644. Its totient is φ = 13906642.

The previous prime is 13906639. The next prime is 13906649. The reversal of 13906643 is 34660931.

It is a happy number.

13906643 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 13906643 - 2² = 13906639 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (13906649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6953321 + 6953322.

It is an arithmetic number, because the mean of its divisors is an integer number (6953322).

Almost surely, 2^13906643 is an apocalyptic number.

13906643 is a deficient number, since it is larger than the sum of its proper divisors (1).

13906643 is an equidigital number, since it uses as much as digits as its factorization.

13906643 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11664, while the sum is 32.

The square root of 13906643 is about 3729.1611657315. The cubic root of 13906643 is about 240.4773082095.

The spelling of 13906643 in words is "thirteen million, nine hundred six thousand, six hundred forty-three".