11800081 has 4 divisors (see below), whose sum is σ = 12313152. Its totient is φ = 11287012.

The previous prime is 11800073. The next prime is 11800093. The reversal of 11800081 is 18000811.

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 a cyclic number.

It is not a de Polignac number, because 11800081 - 2³ = 11800073 is a prime.

It is a super-2 number, since 2×11800081² = 278483823213122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11800001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 256501 + ... + 256546.

It is an arithmetic number, because the mean of its divisors is an integer number (3078288).

Almost surely, 2^11800081 is an apocalyptic number.

It is an amenable number.

11800081 is a deficient number, since it is larger than the sum of its proper divisors (513071).

11800081 is an equidigital number, since it uses as much as digits as its factorization.

11800081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 513070.

The product of its (nonzero) digits is 64, while the sum is 19.

The square root of 11800081 is about 3435.1245974491. The cubic root of 11800081 is about 227.6643324207.

Adding to 11800081 its reverse (18000811), we get a palindrome (29800892).

The spelling of 11800081 in words is "eleven million, eight hundred thousand, eighty-one".