9161689 has 2 divisors, whose sum is σ = 9161690. Its totient is φ = 9161688.

The previous prime is 9161671. The next prime is 9161693. The reversal of 9161689 is 9861619.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8410000 + 751689 = 2900^2 + 867^2 .

It is an emirp because it is prime and its reverse (9861619) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9161689 - 2⁹ = 9161177 is a prime.

It is not a weakly prime, because it can be changed into another prime (9161639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4580844 + 4580845.

It is an arithmetic number, because the mean of its divisors is an integer number (4580845).

Almost surely, 2^9161689 is an apocalyptic number.

It is an amenable number.

9161689 is a deficient number, since it is larger than the sum of its proper divisors (1).

9161689 is an equidigital number, since it uses as much as digits as its factorization.

9161689 is an evil number, because the sum of its binary digits is even.

The product of its digits is 23328, while the sum is 40.

The square root of 9161689 is about 3026.8282078770. The cubic root of 9161689 is about 209.2466506451.

The spelling of 9161689 in words is "nine million, one hundred sixty-one thousand, six hundred eighty-nine".