9898381 has 2 divisors, whose sum is σ = 9898382. Its totient is φ = 9898380.

The previous prime is 9898337. The next prime is 9898397. The reversal of 9898381 is 1838989.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7241481 + 2656900 = 2691^2 + 1630^2 .

It is an emirp because it is prime and its reverse (1838989) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9898381 - 2¹⁵ = 9865613 is a prime.

It is a super-2 number, since 2×9898381² = 195955892842322, which contains 22 as substring.

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

9898381 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9898081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4949190 + 4949191.

It is an arithmetic number, because the mean of its divisors is an integer number (4949191).

Almost surely, 2^9898381 is an apocalyptic number.

It is an amenable number.

9898381 is a deficient number, since it is larger than the sum of its proper divisors (1).

9898381 is an equidigital number, since it uses as much as digits as its factorization.

9898381 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 124416, while the sum is 46.

The square root of 9898381 is about 3146.1692580025. The cubic root of 9898381 is about 214.7112113344.

The spelling of 9898381 in words is "nine million, eight hundred ninety-eight thousand, three hundred eighty-one".