206497 has 4 divisors (see below), whose sum is σ = 212116. Its totient is φ = 200880.

The previous prime is 206489. The next prime is 206501. The reversal of 206497 is 794602.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 794602 = 2 ⋅397301.

It can be written as a sum of positive squares in 2 ways, for example, as 130321 + 76176 = 361^2 + 276^2 .

It is a cyclic number.

It is not a de Polignac number, because 206497 - 2³ = 206489 is a prime.

It is a super-2 number, since 2×206497² = 85282022018, which contains 22 as substring.

It is a Duffinian number.

206497 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (206407) 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, 2754 + ... + 2827.

It is an arithmetic number, because the mean of its divisors is an integer number (53029).

2²⁰⁶⁴⁹⁷ is an apocalyptic number.

It is an amenable number.

206497 is a deficient number, since it is larger than the sum of its proper divisors (5619).

206497 is an equidigital number, since it uses as much as digits as its factorization.

206497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5618.

The product of its (nonzero) digits is 3024, while the sum is 28.

The square root of 206497 is about 454.4194097967. The cubic root of 206497 is about 59.1068636854.

It can be divided in two parts, 206 and 497, that added together give a triangular number (703 = T₃₇).

The spelling of 206497 in words is "two hundred six thousand, four hundred ninety-seven".