9166389161 has 2 divisors, whose sum is σ = 9166389162. Its totient is φ = 9166389160.

The previous prime is 9166389131. The next prime is 9166389209. The reversal of 9166389161 is 1619836619.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8921935936 + 244453225 = 94456^2 + 15635^2 .

It is a cyclic number.

It is not a de Polignac number, because 9166389161 - 2⁶ = 9166389097 is a prime.

It is not a weakly prime, because it can be changed into another prime (9166389121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4583194580 + 4583194581.

It is an arithmetic number, because the mean of its divisors is an integer number (4583194581).

Almost surely, 2^9166389161 is an apocalyptic number.

It is an amenable number.

9166389161 is a deficient number, since it is larger than the sum of its proper divisors (1).

9166389161 is an equidigital number, since it uses as much as digits as its factorization.

9166389161 is an evil number, because the sum of its binary digits is even.

The product of its digits is 419904, while the sum is 50.

The square root of 9166389161 is about 95741.2615385864. The cubic root of 9166389161 is about 2092.8242733828.

The spelling of 9166389161 in words is "nine billion, one hundred sixty-six million, three hundred eighty-nine thousand, one hundred sixty-one".