13409643 has 12 divisors (see below), whose sum is σ = 19361400. Its totient is φ = 8251776.

The previous prime is 13409633. The next prime is 13409647. The reversal of 13409643 is 34690431.

13409643 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 13409643 - 2²⁰ = 12361067 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 13409643.

It is not an unprimeable number, because it can be changed into a prime (13409647) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12718 + ... + 13731.

It is an arithmetic number, because the mean of its divisors is an integer number (1613450).

Almost surely, 2^13409643 is an apocalyptic number.

13409643 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

13409643 is a deficient number, since it is larger than the sum of its proper divisors (5951757).

13409643 is a wasteful number, since it uses less digits than its factorization.

13409643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26478 (or 26465 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 30.

The square root of 13409643 is about 3661.9179400964. The cubic root of 13409643 is about 237.5777355879.

The spelling of 13409643 in words is "thirteen million, four hundred nine thousand, six hundred forty-three".