9213881 has 4 divisors (see below), whose sum is σ = 9755892. Its totient is φ = 8671872.

The previous prime is 9213871. The next prime is 9213923. The reversal of 9213881 is 1883129.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3644281 + 5569600 = 1909^2 + 2360^2 .

It is a cyclic number.

It is not a de Polignac number, because 9213881 - 2¹⁸ = 8951737 is a prime.

It is a super-2 number, since 2×9213881² = 169791206164322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9213821) 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 in 3 ways as a sum of consecutive naturals, for example, 270980 + ... + 271013.

It is an arithmetic number, because the mean of its divisors is an integer number (2438973).

Almost surely, 2^9213881 is an apocalyptic number.

It is an amenable number.

9213881 is a deficient number, since it is larger than the sum of its proper divisors (542011).

9213881 is a wasteful number, since it uses less digits than its factorization.

9213881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 542010.

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

The square root of 9213881 is about 3035.4375302417. The cubic root of 9213881 is about 209.6432415810.

The spelling of 9213881 in words is "nine million, two hundred thirteen thousand, eight hundred eighty-one".