9189681 has 16 divisors (see below), whose sum is σ = 12513600. Its totient is φ = 5997888.

The previous prime is 9189667. The next prime is 9189689. The reversal of 9189681 is 1869819.

It is not a de Polignac number, because 9189681 - 2¹⁸ = 8927537 is a prime.

It is a super-2 number, since 2×9189681² = 168900473763522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (9189689) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 51250 + ... + 51428.

It is an arithmetic number, because the mean of its divisors is an integer number (782100).

Almost surely, 2^9189681 is an apocalyptic number.

It is an amenable number.

9189681 is a deficient number, since it is larger than the sum of its proper divisors (3323919).

9189681 is a wasteful number, since it uses less digits than its factorization.

9189681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 448.

The product of its digits is 31104, while the sum is 42.

The square root of 9189681 is about 3031.4486635930. The cubic root of 9189681 is about 209.4595399601.

It can be divided in two parts, 9189 and 681, that added together give a triangular number (9870 = T₁₄₀).

The spelling of 9189681 in words is "nine million, one hundred eighty-nine thousand, six hundred eighty-one".