9895981 has 2 divisors, whose sum is σ = 9895982. Its totient is φ = 9895980.

The previous prime is 9895961. The next prime is 9895993. The reversal of 9895981 is 1895989.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7672900 + 2223081 = 2770^2 + 1491^2 .

It is an emirp because it is prime and its reverse (1895989) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9895981 is a prime.

It is a super-2 number, since 2×9895981² = 195860879904722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9895961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4947990 + 4947991.

It is an arithmetic number, because the mean of its divisors is an integer number (4947991).

Almost surely, 2^9895981 is an apocalyptic number.

It is an amenable number.

9895981 is a deficient number, since it is larger than the sum of its proper divisors (1).

9895981 is an equidigital number, since it uses as much as digits as its factorization.

9895981 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 233280, while the sum is 49.

The square root of 9895981 is about 3145.7878186553. The cubic root of 9895981 is about 214.6938566929.

The spelling of 9895981 in words is "nine million, eight hundred ninety-five thousand, nine hundred eighty-one".