13807811 has 4 divisors (see below), whose sum is σ = 13944624. Its totient is φ = 13671000.

The previous prime is 13807769. The next prime is 13807817. The reversal of 13807811 is 11870831.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 13807811 - 2²² = 9613507 is a prime.

It is a super-2 number, since 2×13807811² = 381311289223442, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13807817) 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, 68255 + ... + 68456.

It is an arithmetic number, because the mean of its divisors is an integer number (3486156).

Almost surely, 2^13807811 is an apocalyptic number.

13807811 is a deficient number, since it is larger than the sum of its proper divisors (136813).

13807811 is a wasteful number, since it uses less digits than its factorization.

13807811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136812.

The product of its (nonzero) digits is 1344, while the sum is 29.

The square root of 13807811 is about 3715.8863007363. The cubic root of 13807811 is about 239.9062770622.

The spelling of 13807811 in words is "thirteen million, eight hundred seven thousand, eight hundred eleven".