11881839 has 4 divisors (see below), whose sum is σ = 15842456. Its totient is φ = 7921224.

The previous prime is 11881829. The next prime is 11881843. The reversal of 11881839 is 93818811.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 93818811 = 3 ⋅31272937.

It is not a de Polignac number, because 11881839 - 2¹³ = 11873647 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11881797 and 11881806.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11881829) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1980304 + ... + 1980309.

It is an arithmetic number, because the mean of its divisors is an integer number (3960614).

Almost surely, 2^11881839 is an apocalyptic number.

11881839 is a deficient number, since it is larger than the sum of its proper divisors (3960617).

11881839 is an equidigital number, since it uses as much as digits as its factorization.

11881839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3960616.

The product of its digits is 13824, while the sum is 39.

The square root of 11881839 is about 3447.0043516073. The cubic root of 11881839 is about 228.1889208254.

It can be divided in two parts, 11881 and 839, that added together give a triangular number (12720 = T₁₅₉).

The spelling of 11881839 in words is "eleven million, eight hundred eighty-one thousand, eight hundred thirty-nine".