9999976 has 16 divisors (see below), whose sum is σ = 21428640. Its totient is φ = 4285680.

The previous prime is 9999973. The next prime is 9999991. The reversal of 9999976 is 6799999.

It is a happy number.

It is a nialpdrome in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 9999976.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9999971) 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, 89230 + ... + 89341.

It is an arithmetic number, because the mean of its divisors is an integer number (1339290).

Almost surely, 2^9999976 is an apocalyptic number.

It is an amenable number.

9999976 is an abundant number, since it is smaller than the sum of its proper divisors (11428664).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

9999976 is a wasteful number, since it uses less digits than its factorization.

9999976 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178584 (or 178580 counting only the distinct ones).

The product of its digits is 2480058, while the sum is 58.

The square root of 9999976 is about 3162.2738654329. The cubic root of 9999976 is about 215.4432966483.

The spelling of 9999976 in words is "nine million, nine hundred ninety-nine thousand, nine hundred seventy-six".