9896981 has 2 divisors, whose sum is σ = 9896982. Its totient is φ = 9896980.

The previous prime is 9896951. The next prime is 9896987. The reversal of 9896981 is 1896989.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4990756 + 4906225 = 2234^2 + 2215^2 .

It is an emirp because it is prime and its reverse (1896989) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9896981 is a prime.

It is a super-2 number, since 2×9896981² = 195900465828722, which contains 22 as substring.

It is a Chen prime.

It is an Ulam number.

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 (9896987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4948490 + 4948491.

It is an arithmetic number, because the mean of its divisors is an integer number (4948491).

Almost surely, 2^9896981 is an apocalyptic number.

It is an amenable number.

9896981 is a deficient number, since it is larger than the sum of its proper divisors (1).

9896981 is an equidigital number, since it uses as much as digits as its factorization.

9896981 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 279936, while the sum is 50.

The square root of 9896981 is about 3145.9467573371. The cubic root of 9896981 is about 214.7010881345.

It can be divided in two parts, 98 and 96981, that added together give a palindrome (97079).

The spelling of 9896981 in words is "nine million, eight hundred ninety-six thousand, nine hundred eighty-one".