11181649 has 2 divisors, whose sum is σ = 11181650. Its totient is φ = 11181648.

The previous prime is 11181641. The next prime is 11181661. The reversal of 11181649 is 94618111.

11181649 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5914624 + 5267025 = 2432^2 + 2295^2 .

It is a cyclic number.

It is not a de Polignac number, because 11181649 - 2³ = 11181641 is a prime.

It is equal to p₇₃₇₇₄₃ and since 11181649 and 737743 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11181649.

It is not a weakly prime, because it can be changed into another prime (11181641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5590824 + 5590825.

It is an arithmetic number, because the mean of its divisors is an integer number (5590825).

Almost surely, 2^11181649 is an apocalyptic number.

It is an amenable number.

11181649 is a deficient number, since it is larger than the sum of its proper divisors (1).

11181649 is an equidigital number, since it uses as much as digits as its factorization.

11181649 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1728, while the sum is 31.

The square root of 11181649 is about 3343.8972771304. The cubic root of 11181649 is about 223.6155248260.

The spelling of 11181649 in words is "eleven million, one hundred eighty-one thousand, six hundred forty-nine".