11820169 has 2 divisors, whose sum is σ = 11820170. Its totient is φ = 11820168.

The previous prime is 11820167. The next prime is 11820173. The reversal of 11820169 is 96102811.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7868025 + 3952144 = 2805^2 + 1988^2 .

It is a cyclic number.

It is not a de Polignac number, because 11820169 - 2¹ = 11820167 is a prime.

It is a super-2 number, since 2×11820169² = 279432790377122, which contains 22 as substring.

Together with 11820167, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (11820161) 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 as a sum of consecutive naturals, namely, 5910084 + 5910085.

It is an arithmetic number, because the mean of its divisors is an integer number (5910085).

Almost surely, 2^11820169 is an apocalyptic number.

It is an amenable number.

11820169 is a deficient number, since it is larger than the sum of its proper divisors (1).

11820169 is an equidigital number, since it uses as much as digits as its factorization.

11820169 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864, while the sum is 28.

The square root of 11820169 is about 3438.0472655273. The cubic root of 11820169 is about 227.7934481563.

The spelling of 11820169 in words is "eleven million, eight hundred twenty thousand, one hundred sixty-nine".