206453 has 4 divisors (see below), whose sum is σ = 222348. Its totient is φ = 190560.

The previous prime is 206447. The next prime is 206461. The reversal of 206453 is 354602.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 354602 = 2 ⋅177301.

It can be written as a sum of positive squares in 2 ways, for example, as 117649 + 88804 = 343^2 + 298^2 .

It is a cyclic number.

It is not a de Polignac number, because 206453 - 2⁸ = 206197 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (206413) 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, 7928 + ... + 7953.

It is an arithmetic number, because the mean of its divisors is an integer number (55587).

2²⁰⁶⁴⁵³ is an apocalyptic number.

It is an amenable number.

206453 is a deficient number, since it is larger than the sum of its proper divisors (15895).

206453 is a wasteful number, since it uses less digits than its factorization.

206453 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15894.

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 206453 is about 454.3709937925. The cubic root of 206453 is about 59.1026652600.

The spelling of 206453 in words is "two hundred six thousand, four hundred fifty-three".