13947505 has 16 divisors (see below), whose sum is σ = 19664064. Its totient is φ = 9362880.

The previous prime is 13947491. The next prime is 13947511. The reversal of 13947505 is 50574931.

13947505 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 13947505 - 2⁵ = 13947473 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9039 + ... + 10468.

It is an arithmetic number, because the mean of its divisors is an integer number (1229004).

Almost surely, 2^13947505 is an apocalyptic number.

It is an amenable number.

13947505 is a deficient number, since it is larger than the sum of its proper divisors (5716559).

13947505 is a wasteful number, since it uses less digits than its factorization.

13947505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19536.

The product of its (nonzero) digits is 18900, while the sum is 34.

The square root of 13947505 is about 3734.6358590899. The cubic root of 13947505 is about 240.7126100274.

The spelling of 13947505 in words is "thirteen million, nine hundred forty-seven thousand, five hundred five".