9981722 has 8 divisors (see below), whose sum is σ = 14991156. Its totient is φ = 4984672.

The previous prime is 9981691. The next prime is 9981731. The reversal of 9981722 is 2271899.

It can be written as a sum of positive squares in 2 ways, for example, as 9740641 + 241081 = 3121^2 + 491^2 .

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

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 713 + ... + 4524.

Almost surely, 2^9981722 is an apocalyptic number.

9981722 is a deficient number, since it is larger than the sum of its proper divisors (5009434).

9981722 is a wasteful number, since it uses less digits than its factorization.

9981722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6192.

The product of its digits is 18144, while the sum is 38.

The square root of 9981722 is about 3159.3863328184. The cubic root of 9981722 is about 215.3121264238.

The spelling of 9981722 in words is "nine million, nine hundred eighty-one thousand, seven hundred twenty-two".