11812973 has 4 divisors (see below), whose sum is σ = 11831100. Its totient is φ = 11794848.

The previous prime is 11812963. The next prime is 11812981. The reversal of 11812973 is 37921811.

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

It can be written as a sum of positive squares in 2 ways, for example, as 11744329 + 68644 = 3427^2 + 262^2 .

It is a cyclic number.

It is not a de Polignac number, because 11812973 - 2¹⁸ = 11550829 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11812903) 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, 8048 + ... + 9401.

It is an arithmetic number, because the mean of its divisors is an integer number (2957775).

Almost surely, 2^11812973 is an apocalyptic number.

It is an amenable number.

11812973 is a deficient number, since it is larger than the sum of its proper divisors (18127).

11812973 is an equidigital number, since it uses as much as digits as its factorization.

11812973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18126.

The product of its digits is 3024, while the sum is 32.

The square root of 11812973 is about 3437.0005819028. Note that the first 3 decimals coincide. The cubic root of 11812973 is about 227.7472126524.

The spelling of 11812973 in words is "eleven million, eight hundred twelve thousand, nine hundred seventy-three".