9973966 has 4 divisors (see below), whose sum is σ = 14960952. Its totient is φ = 4986982.

The previous prime is 9973933. The next prime is 9973967. The reversal of 9973966 is 6693799.

It is a semiprime because it is the product of two primes.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9973967) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2493490 + ... + 2493493.

It is an arithmetic number, because the mean of its divisors is an integer number (3740238).

Almost surely, 2^9973966 is an apocalyptic number.

9973966 is a deficient number, since it is larger than the sum of its proper divisors (4986986).

9973966 is a wasteful number, since it uses less digits than its factorization.

9973966 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4986985.

The product of its digits is 551124, while the sum is 49.

The square root of 9973966 is about 3158.1586407272. The cubic root of 9973966 is about 215.2563446802.

The spelling of 9973966 in words is "nine million, nine hundred seventy-three thousand, nine hundred sixty-six".