9981922 has 4 divisors (see below), whose sum is σ = 14972886. Its totient is φ = 4990960.

The previous prime is 9981919. The next prime is 9981929. The reversal of 9981922 is 2291899.

9981922 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2291899 = 29 ⋅79031.

It can be written as a sum of positive squares in only one way, i.e., 9678321 + 303601 = 3111^2 + 551^2 .

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (9981929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2495479 + ... + 2495482.

Almost surely, 2^9981922 is an apocalyptic number.

9981922 is a deficient number, since it is larger than the sum of its proper divisors (4990964).

9981922 is a wasteful number, since it uses less digits than its factorization.

9981922 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4990963.

The product of its digits is 23328, while the sum is 40.

The square root of 9981922 is about 3159.4179843762. The cubic root of 9981922 is about 215.3135644568.

The spelling of 9981922 in words is "nine million, nine hundred eighty-one thousand, nine hundred twenty-two".