9128681 has 2 divisors, whose sum is σ = 9128682. Its totient is φ = 9128680.

The previous prime is 9128659. The next prime is 9128689. The reversal of 9128681 is 1868219.

9128681 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9120400 + 8281 = 3020^2 + 91^2 .

It is a cyclic number.

It is not a de Polignac number, because 9128681 - 2⁶ = 9128617 is a prime.

It is a super-2 number, since 2×9128681² = 166665633599522, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (9128689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4564340 + 4564341.

It is an arithmetic number, because the mean of its divisors is an integer number (4564341).

Almost surely, 2^9128681 is an apocalyptic number.

It is an amenable number.

9128681 is a deficient number, since it is larger than the sum of its proper divisors (1).

9128681 is an equidigital number, since it uses as much as digits as its factorization.

9128681 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6912, while the sum is 35.

The square root of 9128681 is about 3021.3707154204. The cubic root of 9128681 is about 208.9950549413.

The spelling of 9128681 in words is "nine million, one hundred twenty-eight thousand, six hundred eighty-one".