9971761 has 2 divisors, whose sum is σ = 9971762. Its totient is φ = 9971760.

The previous prime is 9971749. The next prime is 9971779. The reversal of 9971761 is 1671799.

9971761 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9884736 + 87025 = 3144^2 + 295^2 .

It is a cyclic number.

It is not a de Polignac number, because 9971761 - 2⁵ = 9971729 is a prime.

It is a super-2 number, since 2×9971761² = 198872034882242, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (9971711) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4985880 + 4985881.

It is an arithmetic number, because the mean of its divisors is an integer number (4985881).

Almost surely, 2^9971761 is an apocalyptic number.

It is an amenable number.

9971761 is a deficient number, since it is larger than the sum of its proper divisors (1).

9971761 is an equidigital number, since it uses as much as digits as its factorization.

9971761 is an evil number, because the sum of its binary digits is even.

The product of its digits is 23814, while the sum is 40.

The square root of 9971761 is about 3157.8095256047. The cubic root of 9971761 is about 215.2404808730.

The spelling of 9971761 in words is "nine million, nine hundred seventy-one thousand, seven hundred sixty-one".