9997976 has 8 divisors (see below), whose sum is σ = 18746220. Its totient is φ = 4998984.

The previous prime is 9997969. The next prime is 9997987. The reversal of 9997976 is 6797999.

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 polite number, since it can be written as a sum of consecutive naturals, namely, 624866 + ... + 624881.

Almost surely, 2^9997976 is an apocalyptic number.

It is an amenable number.

9997976 is a deficient number, since it is larger than the sum of its proper divisors (8748244).

9997976 is a wasteful number, since it uses less digits than its factorization.

9997976 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1249753 (or 1249749 counting only the distinct ones).

The product of its digits is 1928934, while the sum is 56.

The square root of 9997976 is about 3161.9576214744. The cubic root of 9997976 is about 215.4289327697.

The spelling of 9997976 in words is "nine million, nine hundred ninety-seven thousand, nine hundred seventy-six".