13947539 has 8 divisors (see below), whose sum is σ = 14826240. Its totient is φ = 13083336.

The previous prime is 13947517. The next prime is 13947547. The reversal of 13947539 is 93574931.

13947539 is digitally balanced in base 2, because in such base 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 a de Polignac number, because none of the positive numbers 2^k-13947539 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13947496 and 13947505.

It is not an unprimeable number, because it can be changed into a prime (13947139) 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, 1607 + ... + 5520.

It is an arithmetic number, because the mean of its divisors is an integer number (1853280).

Almost surely, 2^13947539 is an apocalyptic number.

13947539 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

13947539 is a deficient number, since it is larger than the sum of its proper divisors (878701).

13947539 is a wasteful number, since it uses less digits than its factorization.

13947539 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7249.

The product of its digits is 102060, while the sum is 41.

The square root of 13947539 is about 3734.6404110704. The cubic root of 13947539 is about 240.7128056232.

The spelling of 13947539 in words is "thirteen million, nine hundred forty-seven thousand, five hundred thirty-nine".