13969911 has 8 divisors (see below), whose sum is σ = 18646144. Its totient is φ = 9303480.

The previous prime is 13969897. The next prime is 13969913. The reversal of 13969911 is 11996931.

It is a happy number.

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

It is not a de Polignac number, because 13969911 - 2⁶ = 13969847 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 13969911.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13969913) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2070 + ... + 5676.

It is an arithmetic number, because the mean of its divisors is an integer number (2330768).

Almost surely, 2^13969911 is an apocalyptic number.

13969911 is a deficient number, since it is larger than the sum of its proper divisors (4676233).

13969911 is a wasteful number, since it uses less digits than its factorization.

13969911 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4901.

The product of its digits is 13122, while the sum is 39.

The square root of 13969911 is about 3737.6344122988. The cubic root of 13969911 is about 240.8414388330.

The spelling of 13969911 in words is "thirteen million, nine hundred sixty-nine thousand, nine hundred eleven".