13130905 has 4 divisors (see below), whose sum is σ = 15757092. Its totient is φ = 10504720.

The previous prime is 13130891. The next prime is 13130927. The reversal of 13130905 is 50903131.

13130905 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 9585216 + 3545689 = 3096^2 + 1883^2 .

It is not a de Polignac number, because 13130905 - 2⁹ = 13130393 is a prime.

It is a super-2 number, since 2×13130905² = 344841332238050, which contains 22 as substring.

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, 1313086 + ... + 1313095.

It is an arithmetic number, because the mean of its divisors is an integer number (3939273).

Almost surely, 2^13130905 is an apocalyptic number.

It is an amenable number.

13130905 is a deficient number, since it is larger than the sum of its proper divisors (2626187).

13130905 is an equidigital number, since it uses as much as digits as its factorization.

13130905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2626186.

The product of its (nonzero) digits is 405, while the sum is 22.

The square root of 13130905 is about 3623.6590623291. The cubic root of 13130905 is about 235.9200689284.

The spelling of 13130905 in words is "thirteen million, one hundred thirty thousand, nine hundred five".