11822819 has 4 divisors (see below), whose sum is σ = 11867040. Its totient is φ = 11778600.

The previous prime is 11822813. The next prime is 11822821. The reversal of 11822819 is 91822811.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11822819 is a prime.

It is a super-2 number, since 2×11822819² = 279558098213522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11822813) 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, 21707 + ... + 22244.

It is an arithmetic number, because the mean of its divisors is an integer number (2966760).

Almost surely, 2^11822819 is an apocalyptic number.

11822819 is a deficient number, since it is larger than the sum of its proper divisors (44221).

11822819 is an equidigital number, since it uses as much as digits as its factorization.

11822819 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44220.

The product of its digits is 2304, while the sum is 32.

The square root of 11822819 is about 3438.4326371183. The cubic root of 11822819 is about 227.8104701219.

The spelling of 11822819 in words is "eleven million, eight hundred twenty-two thousand, eight hundred nineteen".