11936819 has 4 divisors (see below), whose sum is σ = 12162096. Its totient is φ = 11711544.

The previous prime is 11936809. The next prime is 11936909. The reversal of 11936819 is 91863911.

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 11936819 - 2⁴ = 11936803 is a prime.

It is a super-2 number, since 2×11936819² = 284975295677522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11936809) 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, 112559 + ... + 112664.

It is an arithmetic number, because the mean of its divisors is an integer number (3040524).

Almost surely, 2^11936819 is an apocalyptic number.

11936819 is a deficient number, since it is larger than the sum of its proper divisors (225277).

11936819 is an equidigital number, since it uses as much as digits as its factorization.

11936819 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 225276.

The product of its digits is 11664, while the sum is 38.

The square root of 11936819 is about 3454.9701880045. The cubic root of 11936819 is about 228.5403402101.

The spelling of 11936819 in words is "eleven million, nine hundred thirty-six thousand, eight hundred nineteen".