13643343 has 32 divisors (see below), whose sum is σ = 23736320. Its totient is φ = 7581600.

The previous prime is 13643339. The next prime is 13643351. The reversal of 13643343 is 34334631.

13643343 is a `hidden beast` number, since 13 + 643 + 3 + 4 + 3 = 666.

13643343 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 13643343 - 2² = 13643339 is a prime.

It is a super-2 number, since 2×13643343² = 372281616431298, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13643323) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6018 + ... + 7968.

It is an arithmetic number, because the mean of its divisors is an integer number (741760).

Almost surely, 2^13643343 is an apocalyptic number.

13643343 is a deficient number, since it is larger than the sum of its proper divisors (10092977).

13643343 is a wasteful number, since it uses less digits than its factorization.

13643343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2004 (or 1998 counting only the distinct ones).

The product of its digits is 7776, while the sum is 27.

The square root of 13643343 is about 3693.6896187958. The cubic root of 13643343 is about 238.9499437077.

Adding to 13643343 its reverse (34334631), we get a palindrome (47977974).

The spelling of 13643343 in words is "thirteen million, six hundred forty-three thousand, three hundred forty-three".