210973 has 4 divisors (see below), whose sum is σ = 241120. Its totient is φ = 180828.

The previous prime is 210967. The next prime is 211007. The reversal of 210973 is 379012.

210973 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 210973 - 2⁹ = 210461 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 12.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210913) 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, 15063 + ... + 15076.

It is an arithmetic number, because the mean of its divisors is an integer number (60280).

2²¹⁰⁹⁷³ is an apocalyptic number.

It is an amenable number.

210973 is a deficient number, since it is larger than the sum of its proper divisors (30147).

210973 is an equidigital number, since it uses as much as digits as its factorization.

210973 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30146.

The product of its (nonzero) digits is 378, while the sum is 22.

The square root of 210973 is about 459.3179726508. The cubic root of 210973 is about 59.5308786830.

Adding to 210973 its reverse (379012), we get a palindrome (589985).

The spelling of 210973 in words is "two hundred ten thousand, nine hundred seventy-three".