2173973 has 4 divisors (see below), whose sum is σ = 2210880. Its totient is φ = 2137068.

The previous prime is 2173967. The next prime is 2173981. The reversal of 2173973 is 3793712.

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 2173973 - 2⁴ = 2173957 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 (2173903) 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, 18365 + ... + 18482.

It is an arithmetic number, because the mean of its divisors is an integer number (552720).

2^2173973 is an apocalyptic number.

It is an amenable number.

2173973 is a deficient number, since it is larger than the sum of its proper divisors (36907).

2173973 is an equidigital number, since it uses as much as digits as its factorization.

2173973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36906.

The product of its digits is 7938, while the sum is 32.

The square root of 2173973 is about 1474.4398936545. The cubic root of 2173973 is about 129.5442224605.

It can be divided in two parts, 21739 and 73, that added together give a palindrome (21812).

The spelling of 2173973 in words is "two million, one hundred seventy-three thousand, nine hundred seventy-three".