13163905 has 4 divisors (see below), whose sum is σ = 15796692. Its totient is φ = 10531120.

The previous prime is 13163879. The next prime is 13163963. The reversal of 13163905 is 50936131.

13163905 is digitally balanced in base 3, 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.

It can be written as a sum of positive squares in 2 ways, for example, as 4875264 + 8288641 = 2208^2 + 2879^2 .

It is not a de Polignac number, because 13163905 - 2⁵ = 13163873 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1316386 + ... + 1316395.

It is an arithmetic number, because the mean of its divisors is an integer number (3949173).

Almost surely, 2^13163905 is an apocalyptic number.

It is an amenable number.

13163905 is a deficient number, since it is larger than the sum of its proper divisors (2632787).

13163905 is an equidigital number, since it uses as much as digits as its factorization.

13163905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2632786.

The product of its (nonzero) digits is 2430, while the sum is 28.

The square root of 13163905 is about 3628.2096135698. The cubic root of 13163905 is about 236.1175381667.

The spelling of 13163905 in words is "thirteen million, one hundred sixty-three thousand, nine hundred five".