13967909 has 4 divisors (see below), whose sum is σ = 13979904. Its totient is φ = 13955916.

The previous prime is 13967867. The next prime is 13967917. The reversal of 13967909 is 90976931.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 90976931 = 2671 ⋅34061.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13967909 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 13967909.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13967929) 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, 4037 + ... + 6650.

It is an arithmetic number, because the mean of its divisors is an integer number (3494976).

Almost surely, 2^13967909 is an apocalyptic number.

It is an amenable number.

13967909 is a deficient number, since it is larger than the sum of its proper divisors (11995).

13967909 is a wasteful number, since it uses less digits than its factorization.

13967909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11994.

The product of its (nonzero) digits is 91854, while the sum is 44.

The square root of 13967909 is about 3737.3665862476. The cubic root of 13967909 is about 240.8299334484.

The spelling of 13967909 in words is "thirteen million, nine hundred sixty-seven thousand, nine hundred nine".