9938281 has 2 divisors, whose sum is σ = 9938282. Its totient is φ = 9938280.

The previous prime is 9938263. The next prime is 9938297. The reversal of 9938281 is 1828399.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8970025 + 968256 = 2995^2 + 984^2 .

It is an emirp because it is prime and its reverse (1828399) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9938281 - 2⁵ = 9938249 is a prime.

It is a super-2 number, since 2×9938281² = 197538858469922, which contains 22 as substring.

It is a Chen prime.

9938281 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (9938221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4969140 + 4969141.

It is an arithmetic number, because the mean of its divisors is an integer number (4969141).

Almost surely, 2^9938281 is an apocalyptic number.

It is an amenable number.

9938281 is a deficient number, since it is larger than the sum of its proper divisors (1).

9938281 is an equidigital number, since it uses as much as digits as its factorization.

9938281 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 31104, while the sum is 40.

The square root of 9938281 is about 3152.5039254535. The cubic root of 9938281 is about 214.9993221540. Note that the first 3 decimals are identical.

The spelling of 9938281 in words is "nine million, nine hundred thirty-eight thousand, two hundred eighty-one".