9873181 has 2 divisors, whose sum is σ = 9873182. Its totient is φ = 9873180.

The previous prime is 9873167. The next prime is 9873223. The reversal of 9873181 is 1813789.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5736025 + 4137156 = 2395^2 + 2034^2 .

It is an emirp because it is prime and its reverse (1813789) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9873181 - 2¹³ = 9864989 is a prime.

It is a super-2 number, since 2×9873181² = 194959406117522, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 9873181.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9873121) 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, 4936590 + 4936591.

It is an arithmetic number, because the mean of its divisors is an integer number (4936591).

Almost surely, 2^9873181 is an apocalyptic number.

It is an amenable number.

9873181 is a deficient number, since it is larger than the sum of its proper divisors (1).

9873181 is an equidigital number, since it uses as much as digits as its factorization.

9873181 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12096, while the sum is 37.

The square root of 9873181 is about 3142.1618354248. The cubic root of 9873181 is about 214.5288474812.

The spelling of 9873181 in words is "nine million, eight hundred seventy-three thousand, one hundred eighty-one".