11155923 has 12 divisors (see below), whose sum is σ = 16670160. Its totient is φ = 7180656.

The previous prime is 11155891. The next prime is 11155931. The reversal of 11155923 is 32955111.

It is not a de Polignac number, because 11155923 - 2⁵ = 11155891 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11155973) 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 11 ways as a sum of consecutive naturals, for example, 21111 + ... + 21632.

It is an arithmetic number, because the mean of its divisors is an integer number (1389180).

Almost surely, 2^11155923 is an apocalyptic number.

11155923 is a deficient number, since it is larger than the sum of its proper divisors (5514237).

11155923 is a wasteful number, since it uses less digits than its factorization.

11155923 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42778 (or 42775 counting only the distinct ones).

The product of its digits is 1350, while the sum is 27.

The square root of 11155923 is about 3340.0483529434. The cubic root of 11155923 is about 223.4438998574.

The spelling of 11155923 in words is "eleven million, one hundred fifty-five thousand, nine hundred twenty-three".