9678181 has 2 divisors, whose sum is σ = 9678182. Its totient is φ = 9678180.

The previous prime is 9678143. The next prime is 9678187. The reversal of 9678181 is 1818769.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9054081 + 624100 = 3009^2 + 790^2 .

It is an emirp because it is prime and its reverse (1818769) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9678181 - 2¹⁵ = 9645413 is a prime.

It is a super-2 number, since 2×9678181² = 187334374937522, which contains 22 as substring.

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 (9678187) 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, 4839090 + 4839091.

It is an arithmetic number, because the mean of its divisors is an integer number (4839091).

Almost surely, 2^9678181 is an apocalyptic number.

It is an amenable number.

9678181 is a deficient number, since it is larger than the sum of its proper divisors (1).

9678181 is an equidigital number, since it uses as much as digits as its factorization.

9678181 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 24192, while the sum is 40.

The square root of 9678181 is about 3110.9774991150. The cubic root of 9678181 is about 213.1070971337.

The spelling of 9678181 in words is "nine million, six hundred seventy-eight thousand, one hundred eighty-one".