13949509 has 8 divisors (see below), whose sum is σ = 16035840. Its totient is φ = 11886576.

The previous prime is 13949491. The next prime is 13949519. The reversal of 13949509 is 90594931.

13949509 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 13949509 - 2⁹ = 13948997 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13949519) 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, 4549 + ... + 6970.

It is an arithmetic number, because the mean of its divisors is an integer number (2004480).

Almost surely, 2^13949509 is an apocalyptic number.

It is an amenable number.

13949509 is a deficient number, since it is larger than the sum of its proper divisors (2086331).

13949509 is a wasteful number, since it uses less digits than its factorization.

13949509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11699.

The product of its (nonzero) digits is 43740, while the sum is 40.

The square root of 13949509 is about 3734.9041487031. The cubic root of 13949509 is about 240.7241381339.

The spelling of 13949509 in words is "thirteen million, nine hundred forty-nine thousand, five hundred nine".