918161 has 2 divisors, whose sum is σ = 918162. Its totient is φ = 918160.

The previous prime is 918157. The next prime is 918173. The reversal of 918161 is 161819.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 913936 + 4225 = 956^2 + 65^2 .

It is a cyclic number.

It is not a de Polignac number, because 918161 - 2² = 918157 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 918161.

It is not a weakly prime, because it can be changed into another prime (918131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 459080 + 459081.

It is an arithmetic number, because the mean of its divisors is an integer number (459081).

2⁹¹⁸¹⁶¹ is an apocalyptic number.

It is an amenable number.

918161 is a deficient number, since it is larger than the sum of its proper divisors (1).

918161 is an equidigital number, since it uses as much as digits as its factorization.

918161 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 432, while the sum is 26.

The square root of 918161 is about 958.2071801025. The cubic root of 918161 is about 97.1940353783.

The spelling of 918161 in words is "nine hundred eighteen thousand, one hundred sixty-one".