13705947 has 24 divisors (see below), whose sum is σ = 20629440. Its totient is φ = 8760960.

The previous prime is 13705919. The next prime is 13705963. The reversal of 13705947 is 74950731.

It is a happy number.

13705947 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 13705947 - 2¹⁰ = 13704923 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13705997) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 26047 + ... + 26567.

It is an arithmetic number, because the mean of its divisors is an integer number (859560).

Almost surely, 2^13705947 is an apocalyptic number.

13705947 is a deficient number, since it is larger than the sum of its proper divisors (6923493).

13705947 is a wasteful number, since it uses less digits than its factorization.

13705947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 643 (or 640 counting only the distinct ones).

The product of its (nonzero) digits is 26460, while the sum is 36.

The square root of 13705947 is about 3702.1543727943. The cubic root of 13705947 is about 239.3148689253.

The spelling of 13705947 in words is "thirteen million, seven hundred five thousand, nine hundred forty-seven".