9973818 has 24 divisors (see below), whose sum is σ = 21785088. Its totient is φ = 3297672.

The previous prime is 9973813. The next prime is 9973819. The reversal of 9973818 is 8183799.

It is not an unprimeable number, because it can be changed into a prime (9973811) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 105 + ... + 4467.

It is an arithmetic number, because the mean of its divisors is an integer number (907712).

Almost surely, 2^9973818 is an apocalyptic number.

9973818 is an abundant number, since it is smaller than the sum of its proper divisors (11811270).

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

9973818 is a wasteful number, since it uses less digits than its factorization.

9973818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4498 (or 4495 counting only the distinct ones).

The product of its digits is 108864, while the sum is 45.

The square root of 9973818 is about 3158.1352092651. The cubic root of 9973818 is about 215.2552799718.

The spelling of 9973818 in words is "nine million, nine hundred seventy-three thousand, eight hundred eighteen".