8981213 has 8 divisors (see below), whose sum is σ = 9445080. Its totient is φ = 8527680.

The previous prime is 8981191. The next prime is 8981233. The reversal of 8981213 is 3121898.

It can be written as a sum of positive squares in 4 ways, for example, as 1435204 + 7546009 = 1198^2 + 2747^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 8981213 - 2¹² = 8977117 is a prime.

It is a super-3 number, since 3×8981213³ (a number of 22 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 8981213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8981233) 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 in 7 ways as a sum of consecutive naturals, for example, 770 + ... + 4307.

It is an arithmetic number, because the mean of its divisors is an integer number (1180635).

Almost surely, 2^8981213 is an apocalyptic number.

It is an amenable number.

8981213 is a deficient number, since it is larger than the sum of its proper divisors (463867).

8981213 is a wasteful number, since it uses less digits than its factorization.

8981213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5167.

The product of its digits is 3456, while the sum is 32.

The square root of 8981213 is about 2996.8671975915. The cubic root of 8981213 is about 207.8635461652.

The spelling of 8981213 in words is "eight million, nine hundred eighty-one thousand, two hundred thirteen".