11820847 has 2 divisors, whose sum is σ = 11820848. Its totient is φ = 11820846.

The previous prime is 11820841. The next prime is 11820857. The reversal of 11820847 is 74802811.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11820847 - 2³ = 11820839 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11820841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5910423 + 5910424.

It is an arithmetic number, because the mean of its divisors is an integer number (5910424).

Almost surely, 2^11820847 is an apocalyptic number.

11820847 is a deficient number, since it is larger than the sum of its proper divisors (1).

11820847 is an equidigital number, since it uses as much as digits as its factorization.

11820847 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3584, while the sum is 31.

The square root of 11820847 is about 3438.1458665973. The cubic root of 11820847 is about 227.7978034523.

The spelling of 11820847 in words is "eleven million, eight hundred twenty thousand, eight hundred forty-seven".