9921976 has 8 divisors (see below), whose sum is σ = 18603720. Its totient is φ = 4960984.

The previous prime is 9921917. The next prime is 9921983. The reversal of 9921976 is 6791299.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 620116 + ... + 620131.

It is an arithmetic number, because the mean of its divisors is an integer number (2325465).

Almost surely, 2^9921976 is an apocalyptic number.

It is an amenable number.

9921976 is a deficient number, since it is larger than the sum of its proper divisors (8681744).

9921976 is a wasteful number, since it uses less digits than its factorization.

9921976 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1240253 (or 1240249 counting only the distinct ones).

The product of its digits is 61236, while the sum is 43.

The square root of 9921976 is about 3149.9168242987. The cubic root of 9921976 is about 214.8816799848.

The spelling of 9921976 in words is "nine million, nine hundred twenty-one thousand, nine hundred seventy-six".