11090081 has 2 divisors, whose sum is σ = 11090082. Its totient is φ = 11090080.

The previous prime is 11090077. The next prime is 11090083. The reversal of 11090081 is 18009011.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9709456 + 1380625 = 3116^2 + 1175^2 .

It is a cyclic number.

It is not a de Polignac number, because 11090081 - 2² = 11090077 is a prime.

It is a super-2 number, since 2×11090081² = 245979793173122, which contains 22 as substring.

Together with 11090083, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (11090083) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5545040 + 5545041.

It is an arithmetic number, because the mean of its divisors is an integer number (5545041).

Almost surely, 2^11090081 is an apocalyptic number.

It is an amenable number.

11090081 is a deficient number, since it is larger than the sum of its proper divisors (1).

11090081 is an equidigital number, since it uses as much as digits as its factorization.

11090081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 20.

The square root of 11090081 is about 3330.1773226061. The cubic root of 11090081 is about 223.0034452872.

Adding to 11090081 its reverse (18009011), we get a palindrome (29099092).

The spelling of 11090081 in words is "eleven million, ninety thousand, eighty-one".