11533923 has 6 divisors (see below), whose sum is σ = 16660124. Its totient is φ = 7689276.

The previous prime is 11533919. The next prime is 11533937. The reversal of 11533923 is 32933511.

It is a happy number.

It is not a de Polignac number, because 11533923 - 2² = 11533919 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11533943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 640765 + ... + 640782.

Almost surely, 2^11533923 is an apocalyptic number.

11533923 is a deficient number, since it is larger than the sum of its proper divisors (5126201).

11533923 is a wasteful number, since it uses less digits than its factorization.

11533923 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1281553 (or 1281550 counting only the distinct ones).

The product of its digits is 2430, while the sum is 27.

The square root of 11533923 is about 3396.1629819548. The cubic root of 11533923 is about 225.9395967219.

The spelling of 11533923 in words is "eleven million, five hundred thirty-three thousand, nine hundred twenty-three".