13163809 has 4 divisors (see below), whose sum is σ = 13588480. Its totient is φ = 12739140.

The previous prime is 13163803. The next prime is 13163833. The reversal of 13163809 is 90836131.

13163809 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, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 13163809 - 2⁷ = 13163681 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31), and also a Moran number because the ratio is a prime number: 424639 = 13163809 / (1 + 3 + 1 + 6 + 3 + 8 + 0 + 9).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13163803) by changing a digit.

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, 212289 + ... + 212350.

It is an arithmetic number, because the mean of its divisors is an integer number (3397120).

Almost surely, 2^13163809 is an apocalyptic number.

It is an amenable number.

13163809 is a deficient number, since it is larger than the sum of its proper divisors (424671).

13163809 is an equidigital number, since it uses as much as digits as its factorization.

13163809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 424670.

The product of its (nonzero) digits is 3888, while the sum is 31.

The square root of 13163809 is about 3628.1963838800. The cubic root of 13163809 is about 236.1169641896.

The spelling of 13163809 in words is "thirteen million, one hundred sixty-three thousand, eight hundred nine".