13008805 has 4 divisors (see below), whose sum is σ = 15610572. Its totient is φ = 10407040.

The previous prime is 13008781. The next prime is 13008811. The reversal of 13008805 is 50880031.

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 7219969 + 5788836 = 2687^2 + 2406^2 .

It is not a de Polignac number, because 13008805 - 2⁵ = 13008773 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 13008805.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1300876 + ... + 1300885.

It is an arithmetic number, because the mean of its divisors is an integer number (3902643).

Almost surely, 2^13008805 is an apocalyptic number.

It is an amenable number.

13008805 is a deficient number, since it is larger than the sum of its proper divisors (2601767).

13008805 is an equidigital number, since it uses as much as digits as its factorization.

13008805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2601766.

The product of its (nonzero) digits is 960, while the sum is 25.

The square root of 13008805 is about 3606.7721025870. The cubic root of 13008805 is about 235.1865426938.

Adding to 13008805 its reverse (50880031), we get a palindrome (63888836).

The spelling of 13008805 in words is "thirteen million, eight thousand, eight hundred five".