9976 has 16 divisors (see below), whose sum is σ = 19800. Its totient is φ = 4704.

The previous prime is 9973. The next prime is 10007. The reversal of 9976 is 6799.

It is a nialpdrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9973) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 211 + ... + 253.

2⁹⁹⁷⁶ is an apocalyptic number.

9976 is the 58-th octagonal number.

It is an amenable number.

9976 is a deficient number, since it is larger than the sum of its proper divisors (9824).

9976 is a wasteful number, since it uses less digits than its factorization.

9976 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78 (or 74 counting only the distinct ones).

The product of its digits is 3402, while the sum is 31.

The square root of 9976 is about 99.8799279135. The cubic root of 9976 is about 21.5270976160.

The spelling of 9976 in words is "nine thousand, nine hundred seventy-six".