13905705 has 32 divisors (see below), whose sum is σ = 24634368. Its totient is φ = 6641600.

The previous prime is 13905607. The next prime is 13905707. The reversal of 13905705 is 50750931.

It is a happy number.

13905705 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 13905705 - 2⁹ = 13905193 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13905707) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11122 + ... + 12308.

It is an arithmetic number, because the mean of its divisors is an integer number (769824).

Almost surely, 2^13905705 is an apocalyptic number.

13905705 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

13905705 is a deficient number, since it is larger than the sum of its proper divisors (10728663).

13905705 is a wasteful number, since it uses less digits than its factorization.

13905705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1277.

The product of its (nonzero) digits is 4725, while the sum is 30.

The square root of 13905705 is about 3729.0353980621. The cubic root of 13905705 is about 240.4719013742.

The spelling of 13905705 in words is "thirteen million, nine hundred five thousand, seven hundred five".