9219681 has 12 divisors (see below), whose sum is σ = 13500708. Its totient is φ = 6061824.

The previous prime is 9219677. The next prime is 9219701. The reversal of 9219681 is 1869129.

It can be written as a sum of positive squares in 2 ways, for example, as 2944656 + 6275025 = 1716^2 + 2505^2 .

It is not a de Polignac number, because 9219681 - 2² = 9219677 is a prime.

It is a super-2 number, since 2×9219681² = 170005035483522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (9219611) 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 11 ways as a sum of consecutive naturals, for example, 6360 + ... + 7673.

It is an arithmetic number, because the mean of its divisors is an integer number (1125059).

Almost surely, 2^9219681 is an apocalyptic number.

It is an amenable number.

9219681 is a deficient number, since it is larger than the sum of its proper divisors (4281027).

9219681 is a wasteful number, since it uses less digits than its factorization.

9219681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14112 (or 14109 counting only the distinct ones).

The product of its digits is 7776, while the sum is 36.

The square root of 9219681 is about 3036.3927611559. The cubic root of 9219681 is about 209.6872214470.

The spelling of 9219681 in words is "nine million, two hundred nineteen thousand, six hundred eighty-one".