11923993 has 8 divisors (see below), whose sum is σ = 12234888. Its totient is φ = 11616384.

The previous prime is 11923981. The next prime is 11923997. The reversal of 11923993 is 39932911.

It can be written as a sum of positive squares in 4 ways, for example, as 3583449 + 8340544 = 1893^2 + 2888^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11923993 - 2⁹ = 11923481 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11923997) 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 7 ways as a sum of consecutive naturals, for example, 7605 + ... + 9037.

It is an arithmetic number, because the mean of its divisors is an integer number (1529361).

Almost surely, 2^11923993 is an apocalyptic number.

It is an amenable number.

11923993 is a deficient number, since it is larger than the sum of its proper divisors (310895).

11923993 is a wasteful number, since it uses less digits than its factorization.

11923993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1643.

The product of its digits is 13122, while the sum is 37.

The square root of 11923993 is about 3453.1135226054. The cubic root of 11923993 is about 228.4584560582.

The spelling of 11923993 in words is "eleven million, nine hundred twenty-three thousand, nine hundred ninety-three".