9771161 has 4 divisors (see below), whose sum is σ = 10009524. Its totient is φ = 9532800.

The previous prime is 9771143. The next prime is 9771211. The reversal of 9771161 is 1611779.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1611779 = 13 ⋅123983.

It can be written as a sum of positive squares in 2 ways, for example, as 4177936 + 5593225 = 2044^2 + 2365^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9771161 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (9771131) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 119120 + ... + 119201.

It is an arithmetic number, because the mean of its divisors is an integer number (2502381).

Almost surely, 2^9771161 is an apocalyptic number.

It is an amenable number.

9771161 is a deficient number, since it is larger than the sum of its proper divisors (238363).

9771161 is a wasteful number, since it uses less digits than its factorization.

9771161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 238362.

The product of its digits is 2646, while the sum is 32.

The square root of 9771161 is about 3125.8856345042. The cubic root of 9771161 is about 213.7873757926.

The spelling of 9771161 in words is "nine million, seven hundred seventy-one thousand, one hundred sixty-one".