11993231 has 4 divisors (see below), whose sum is σ = 12010200. Its totient is φ = 11976264.

The previous prime is 11993207. The next prime is 11993263. The reversal of 11993231 is 13239911.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 11993231 - 2⁶ = 11993167 is a prime.

It is a super-2 number, since 2×11993231² = 287675179638722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11993194 and 11993203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11992231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7376 + ... + 8853.

It is an arithmetic number, because the mean of its divisors is an integer number (3002550).

Almost surely, 2^11993231 is an apocalyptic number.

11993231 is a deficient number, since it is larger than the sum of its proper divisors (16969).

11993231 is an equidigital number, since it uses as much as digits as its factorization.

11993231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16968.

The product of its digits is 1458, while the sum is 29.

The square root of 11993231 is about 3463.1244563255. The cubic root of 11993231 is about 228.8997927989.

The spelling of 11993231 in words is "eleven million, nine hundred ninety-three thousand, two hundred thirty-one".