11123649 has 20 divisors (see below), whose sum is σ = 16727040. Its totient is φ = 7366680.

The previous prime is 11123647. The next prime is 11123657. The reversal of 11123649 is 94632111.

11123649 is a `hidden beast` number, since 1 + 1 + 12 + 3 + 649 = 666.

It is not a de Polignac number, because 11123649 - 2¹ = 11123647 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (11123647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 15112 + ... + 15830.

It is an arithmetic number, because the mean of its divisors is an integer number (836352).

Almost surely, 2^11123649 is an apocalyptic number.

It is an amenable number.

11123649 is a deficient number, since it is larger than the sum of its proper divisors (5603391).

11123649 is an equidigital number, since it uses as much as digits as its factorization.

11123649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 922 (or 913 counting only the distinct ones).

The product of its digits is 1296, while the sum is 27.

The square root of 11123649 is about 3335.2134864203. The cubic root of 11123649 is about 223.2282179031.

It can be divided in two parts, 1112 and 3649, that added together give a square (4761 = 69²).

The spelling of 11123649 in words is "eleven million, one hundred twenty-three thousand, six hundred forty-nine".