11820839 has 2 divisors, whose sum is σ = 11820840. Its totient is φ = 11820838.

The previous prime is 11820803. The next prime is 11820841. The reversal of 11820839 is 93802811.

11820839 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 11820839 - 2²⁰ = 10772263 is a prime.

Together with 11820841, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11820239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5910419 + 5910420.

It is an arithmetic number, because the mean of its divisors is an integer number (5910420).

Almost surely, 2^11820839 is an apocalyptic number.

11820839 is a deficient number, since it is larger than the sum of its proper divisors (1).

11820839 is an equidigital number, since it uses as much as digits as its factorization.

11820839 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3456, while the sum is 32.

The square root of 11820839 is about 3438.1447031793. The cubic root of 11820839 is about 227.7977520633.

The spelling of 11820839 in words is "eleven million, eight hundred twenty thousand, eight hundred thirty-nine".