211703 has 4 divisors (see below), whose sum is σ = 212760. Its totient is φ = 210648.

The previous prime is 211693. The next prime is 211711. The reversal of 211703 is 307112.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 211703 - 2⁶ = 211639 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 211703.

It is not an unprimeable number, because it can be changed into a prime (211723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 125 + ... + 662.

It is an arithmetic number, because the mean of its divisors is an integer number (53190).

2²¹¹⁷⁰³ is an apocalyptic number.

211703 is a deficient number, since it is larger than the sum of its proper divisors (1057).

211703 is an equidigital number, since it uses as much as digits as its factorization.

211703 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1056.

The product of its (nonzero) digits is 42, while the sum is 14.

The square root of 211703 is about 460.1119429009. Note that the first 3 decimals coincide. The cubic root of 211703 is about 59.5994617311.

Adding to 211703 its reverse (307112), we get a palindrome (518815).

The spelling of 211703 in words is "two hundred eleven thousand, seven hundred three", and thus it is an iban number.