9669981 has 8 divisors (see below), whose sum is σ = 12907840. Its totient is φ = 6439392.

The previous prime is 9669953. The next prime is 9669997. The reversal of 9669981 is 1899669.

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

It is not a de Polignac number, because 9669981 - 2¹⁹ = 9145693 is a prime.

It is a super-2 number, since 2×9669981² = 187017065080722, which contains 22 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 9669981.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9669901) 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 7 ways as a sum of consecutive naturals, for example, 3585 + ... + 5673.

It is an arithmetic number, because the mean of its divisors is an integer number (1613480).

Almost surely, 2^9669981 is an apocalyptic number.

It is an amenable number.

9669981 is a deficient number, since it is larger than the sum of its proper divisors (3237859).

9669981 is a wasteful number, since it uses less digits than its factorization.

9669981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3635.

The product of its digits is 209952, while the sum is 48.

The square root of 9669981 is about 3109.6593060977. The cubic root of 9669981 is about 213.0468939489.

It can be divided in two parts, 96 and 69981, that multiplied together give a palindrome (6718176).

The spelling of 9669981 in words is "nine million, six hundred sixty-nine thousand, nine hundred eighty-one".