11973 has 8 divisors (see below), whose sum is σ = 17248. Its totient is φ = 7344.

The previous prime is 11971. The next prime is 11981. The reversal of 11973 is 37911.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 11973 - 2¹ = 11971 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11971) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 115 + ... + 192.

It is an arithmetic number, because the mean of its divisors is an integer number (2156).

2¹¹⁹⁷³ is an apocalyptic number.

11973 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

11973 is a deficient number, since it is larger than the sum of its proper divisors (5275).

11973 is a wasteful number, since it uses less digits than its factorization.

11973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 323.

The product of its digits is 189, while the sum is 21.

The square root of 11973 is about 109.4212045264. The cubic root of 11973 is about 22.8771012433.

The spelling of 11973 in words is "eleven thousand, nine hundred seventy-three".