9896581 has 2 divisors, whose sum is σ = 9896582. Its totient is φ = 9896580.

The previous prime is 9896563. The next prime is 9896591. The reversal of 9896581 is 1856989.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8608356 + 1288225 = 2934^2 + 1135^2 .

It is an emirp because it is prime and its reverse (1856989) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9896581 is a prime.

It is a super-2 number, since 2×9896581² = 195884630979122, which contains 22 as substring.

It is a Chen prime.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9896521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4948290 + 4948291.

It is an arithmetic number, because the mean of its divisors is an integer number (4948291).

Almost surely, 2^9896581 is an apocalyptic number.

It is an amenable number.

9896581 is a deficient number, since it is larger than the sum of its proper divisors (1).

9896581 is an equidigital number, since it uses as much as digits as its factorization.

9896581 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 155520, while the sum is 46.

The square root of 9896581 is about 3145.8831828280. The cubic root of 9896581 is about 214.6981956163.

The spelling of 9896581 in words is "nine million, eight hundred ninety-six thousand, five hundred eighty-one".