13390643 has 4 divisors (see below), whose sum is σ = 15303600. Its totient is φ = 11477688.

The previous prime is 13390631. The next prime is 13390661. The reversal of 13390643 is 34609331.

13390643 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34609331 = 17 ⋅2035843.

It is a cyclic number.

It is not a de Polignac number, because 13390643 - 2¹² = 13386547 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (13330643) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 956468 + ... + 956481.

It is an arithmetic number, because the mean of its divisors is an integer number (3825900).

Almost surely, 2^13390643 is an apocalyptic number.

13390643 is a deficient number, since it is larger than the sum of its proper divisors (1912957).

13390643 is an equidigital number, since it uses as much as digits as its factorization.

13390643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1912956.

The product of its (nonzero) digits is 5832, while the sum is 29.

The square root of 13390643 is about 3659.3227515484. The cubic root of 13390643 is about 237.4654753139.

Adding to 13390643 its reverse (34609331), we get a palindrome (47999974).

The spelling of 13390643 in words is "thirteen million, three hundred ninety thousand, six hundred forty-three".