210493 has 4 divisors (see below), whose sum is σ = 216220. Its totient is φ = 204768.

The previous prime is 210491. The next prime is 210499. The reversal of 210493 is 394012.

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 195364 + 15129 = 442^2 + 123^2 .

It is a cyclic number.

It is not a de Polignac number, because 210493 - 2¹ = 210491 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 210493.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2808 + ... + 2881.

It is an arithmetic number, because the mean of its divisors is an integer number (54055).

2²¹⁰⁴⁹³ is an apocalyptic number.

It is an amenable number.

210493 is a deficient number, since it is larger than the sum of its proper divisors (5727).

210493 is an equidigital number, since it uses as much as digits as its factorization.

210493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5726.

The product of its (nonzero) digits is 216, while the sum is 19.

The square root of 210493 is about 458.7951612648. The cubic root of 210493 is about 59.4856967243.

It can be divided in two parts, 2104 and 93, that added together give a cube (2197 = 13³).

The spelling of 210493 in words is "two hundred ten thousand, four hundred ninety-three".