2131973 has 4 divisors (see below), whose sum is σ = 2159040. Its totient is φ = 2104908.

The previous prime is 2131951. The next prime is 2131979. The reversal of 2131973 is 3791312.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2131973 - 2¹⁶ = 2066437 is a prime.

It is a Duffinian number.

It is a zygodrome in base 3.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2131979) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13415 + ... + 13572.

It is an arithmetic number, because the mean of its divisors is an integer number (539760).

2^2131973 is an apocalyptic number.

It is an amenable number.

2131973 is a deficient number, since it is larger than the sum of its proper divisors (27067).

2131973 is an equidigital number, since it uses as much as digits as its factorization.

2131973 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27066.

The product of its digits is 1134, while the sum is 26.

The square root of 2131973 is about 1460.1277341384. The cubic root of 2131973 is about 128.7045498921.

The spelling of 2131973 in words is "two million, one hundred thirty-one thousand, nine hundred seventy-three".