13963209 has 8 divisors (see below), whose sum is σ = 20049792. Its totient is φ = 8592720.

The previous prime is 13963193. The next prime is 13963211. The reversal of 13963209 is 90236931.

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

It is not a de Polignac number, because 13963209 - 2⁴ = 13963193 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 13963209.

It is not an unprimeable number, because it can be changed into a prime (13963259) 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, 178977 + ... + 179054.

It is an arithmetic number, because the mean of its divisors is an integer number (2506224).

Almost surely, 2^13963209 is an apocalyptic number.

It is an amenable number.

13963209 is a deficient number, since it is larger than the sum of its proper divisors (6086583).

13963209 is a wasteful number, since it uses less digits than its factorization.

13963209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 358047.

The product of its (nonzero) digits is 8748, while the sum is 33.

The square root of 13963209 is about 3736.7377483575. The cubic root of 13963209 is about 240.8029184847.

The spelling of 13963209 in words is "thirteen million, nine hundred sixty-three thousand, two hundred nine".