11993831 has 4 divisors (see below), whose sum is σ = 12027600. Its totient is φ = 11960064.

The previous prime is 11993801. The next prime is 11993843. The reversal of 11993831 is 13839911.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13839911 = 677 ⋅20443.

It is a cyclic number.

It is not a de Polignac number, because 11993831 - 2¹⁴ = 11977447 is a prime.

It is a super-2 number, since 2×11993831² = 287703964113122, 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 = 11993791 and 11993800.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11993801) 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 3 ways as a sum of consecutive naturals, for example, 16346 + ... + 17063.

It is an arithmetic number, because the mean of its divisors is an integer number (3006900).

Almost surely, 2^11993831 is an apocalyptic number.

11993831 is a deficient number, since it is larger than the sum of its proper divisors (33769).

11993831 is an equidigital number, since it uses as much as digits as its factorization.

11993831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33768.

The product of its digits is 5832, while the sum is 35.

The square root of 11993831 is about 3463.2110822184. The cubic root of 11993831 is about 228.9036098850.

The spelling of 11993831 in words is "eleven million, nine hundred ninety-three thousand, eight hundred thirty-one".