8189161 has 2 divisors, whose sum is σ = 8189162. Its totient is φ = 8189160.

The previous prime is 8189143. The next prime is 8189191. The reversal of 8189161 is 1619818.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5433561 + 2755600 = 2331^2 + 1660^2 .

It is a cyclic number.

It is not a de Polignac number, because 8189161 - 2⁷ = 8189033 is a prime.

It is a super-3 number, since 3×8189161³ (a number of 22 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (8189101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4094580 + 4094581.

It is an arithmetic number, because the mean of its divisors is an integer number (4094581).

Almost surely, 2^8189161 is an apocalyptic number.

It is an amenable number.

8189161 is a deficient number, since it is larger than the sum of its proper divisors (1).

8189161 is an equidigital number, since it uses as much as digits as its factorization.

8189161 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3456, while the sum is 34.

The square root of 8189161 is about 2861.6710153335. The cubic root of 8189161 is about 201.5640780799.

The spelling of 8189161 in words is "eight million, one hundred eighty-nine thousand, one hundred sixty-one".