11923239 has 16 divisors (see below), whose sum is σ = 16904160. Its totient is φ = 7449600.

The previous prime is 11923237. The next prime is 11923259. The reversal of 11923239 is 93232911.

It is a happy number.

It is not a de Polignac number, because 11923239 - 2¹ = 11923237 is a prime.

It is a super-2 number, since 2×11923239² = 284327256502242, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11923231) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19539 + ... + 20139.

It is an arithmetic number, because the mean of its divisors is an integer number (1056510).

Almost surely, 2^11923239 is an apocalyptic number.

11923239 is a deficient number, since it is larger than the sum of its proper divisors (4980921).

11923239 is a wasteful number, since it uses less digits than its factorization.

11923239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1010.

The product of its digits is 2916, while the sum is 30.

The square root of 11923239 is about 3453.0043440459. The cubic root of 11923239 is about 228.4536405206.

Subtracting from 11923239 its sum of digits (30), we obtain a square (11923209 = 3453²).

The spelling of 11923239 in words is "eleven million, nine hundred twenty-three thousand, two hundred thirty-nine".