9973866 has 64 divisors (see below), whose sum is σ = 24641280. Its totient is φ = 2626560.

The previous prime is 9973853. The next prime is 9973871. The reversal of 9973866 is 6683799.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 43440 + ... + 43668.

It is an arithmetic number, because the mean of its divisors is an integer number (385020).

Almost surely, 2^9973866 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9973866, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12320640).

9973866 is an abundant number, since it is smaller than the sum of its proper divisors (14667414).

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

9973866 is a wasteful number, since it uses less digits than its factorization.

9973866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 319.

The product of its digits is 489888, while the sum is 48.

The square root of 9973866 is about 3158.1428086773. The cubic root of 9973866 is about 215.2556252838.

The spelling of 9973866 in words is "nine million, nine hundred seventy-three thousand, eight hundred sixty-six".