13976909 has 4 divisors (see below), whose sum is σ = 13985916. Its totient is φ = 13967904.

The previous prime is 13976903. The next prime is 13976933. The reversal of 13976909 is 90967931.

It is a happy number.

13976909 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 a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 11035684 + 2941225 = 3322^2 + 1715^2 .

It is a cyclic number.

It is not a de Polignac number, because 13976909 - 2¹² = 13972813 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 13976909.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13976903) 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, 1514 + ... + 5499.

It is an arithmetic number, because the mean of its divisors is an integer number (3496479).

Almost surely, 2^13976909 is an apocalyptic number.

It is an amenable number.

13976909 is a deficient number, since it is larger than the sum of its proper divisors (9007).

13976909 is an equidigital number, since it uses as much as digits as its factorization.

13976909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9006.

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

The square root of 13976909 is about 3738.5704487143. The cubic root of 13976909 is about 240.8816473221.

The spelling of 13976909 in words is "thirteen million, nine hundred seventy-six thousand, nine hundred nine".