14013509 has 4 divisors (see below), whose sum is σ = 14622816. Its totient is φ = 13404204.

The previous prime is 14013499. The next prime is 14013511. The reversal of 14013509 is 90531041.

It is a happy number.

14013509 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 Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 90531041 = 1493 ⋅60637.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-14013509 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23), and also a Moran number because the ratio is a prime number: 609283 = 14013509 / (1 + 4 + 0 + 1 + 3 + 5 + 0 + 9).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (14013539) 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, 304619 + ... + 304664.

It is an arithmetic number, because the mean of its divisors is an integer number (3655704).

Almost surely, 2^14013509 is an apocalyptic number.

It is an amenable number.

14013509 is a deficient number, since it is larger than the sum of its proper divisors (609307).

14013509 is an equidigital number, since it uses as much as digits as its factorization.

14013509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 609306.

The product of its (nonzero) digits is 540, while the sum is 23.

The square root of 14013509 is about 3743.4621675663. The cubic root of 14013509 is about 241.0917220014.

The spelling of 14013509 in words is "fourteen million, thirteen thousand, five hundred nine".