13391643 has 8 divisors (see below), whose sum is σ = 18158400. Its totient is φ = 8776328.

The previous prime is 13391641. The next prime is 13391683. The reversal of 13391643 is 34619331.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 13391643 - 2¹ = 13391641 is a prime.

It is a super-2 number, since 2×13391643² = 358672204478898, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 13391643.

It is not an unprimeable number, because it can be changed into a prime (13391641) 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 in 7 ways as a sum of consecutive naturals, for example, 37653 + ... + 38006.

It is an arithmetic number, because the mean of its divisors is an integer number (2269800).

Almost surely, 2^13391643 is an apocalyptic number.

13391643 is a deficient number, since it is larger than the sum of its proper divisors (4766757).

13391643 is an equidigital number, since it uses as much as digits as its factorization.

13391643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75721.

The product of its digits is 5832, while the sum is 30.

The square root of 13391643 is about 3659.4593863028. The cubic root of 13391643 is about 237.4713863958.

The spelling of 13391643 in words is "thirteen million, three hundred ninety-one thousand, six hundred forty-three".