11916161 has 2 divisors, whose sum is σ = 11916162. Its totient is φ = 11916160.

The previous prime is 11916137. The next prime is 11916197. The reversal of 11916161 is 16161911.

11916161 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11771761 + 144400 = 3431^2 + 380^2 .

It is a cyclic number.

It is not a de Polignac number, because 11916161 - 2¹⁸ = 11654017 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 11916161.

It is not a weakly prime, because it can be changed into another prime (11916131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5958080 + 5958081.

It is an arithmetic number, because the mean of its divisors is an integer number (5958081).

Almost surely, 2^11916161 is an apocalyptic number.

It is an amenable number.

11916161 is a deficient number, since it is larger than the sum of its proper divisors (1).

11916161 is an equidigital number, since it uses as much as digits as its factorization.

11916161 is an evil number, because the sum of its binary digits is even.

The product of its digits is 324, while the sum is 26.

The square root of 11916161 is about 3451.9792873075. The cubic root of 11916161 is about 228.4084258789.

The spelling of 11916161 in words is "eleven million, nine hundred sixteen thousand, one hundred sixty-one".