9909976 has 8 divisors (see below), whose sum is σ = 18581220. Its totient is φ = 4954984.

The previous prime is 9909961. The next prime is 9909989. The reversal of 9909976 is 6799099.

It is a happy number.

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, 619366 + ... + 619381.

Almost surely, 2^9909976 is an apocalyptic number.

It is an amenable number.

9909976 is a deficient number, since it is larger than the sum of its proper divisors (8671244).

9909976 is a wasteful number, since it uses less digits than its factorization.

9909976 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1238753 (or 1238749 counting only the distinct ones).

The product of its (nonzero) digits is 275562, while the sum is 49.

The square root of 9909976 is about 3148.0114358115. The cubic root of 9909976 is about 214.7950164546.

The spelling of 9909976 in words is "nine million, nine hundred nine thousand, nine hundred seventy-six".