206876545 has 8 divisors (see below), whose sum is σ = 249834024. Its totient is φ = 164446464.

The previous prime is 206876533. The next prime is 206876561. The reversal of 206876545 is 545678602.

It can be written as a sum of positive squares in 4 ways, for example, as 552049 + 206324496 = 743^2 + 14364^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 206876545 - 2¹⁹ = 206352257 is a prime.

It is a super-2 number, since 2×206876545² = 85595809742274050, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 130984 + ... + 132553.

It is an arithmetic number, because the mean of its divisors is an integer number (31229253).

Almost surely, 2^206876545 is an apocalyptic number.

It is an amenable number.

206876545 is a deficient number, since it is larger than the sum of its proper divisors (42957479).

206876545 is a wasteful number, since it uses less digits than its factorization.

206876545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 263699.

The product of its (nonzero) digits is 403200, while the sum is 43.

The square root of 206876545 is about 14383.2035722227. The cubic root of 206876545 is about 591.4305466167.

The spelling of 206876545 in words is "two hundred six million, eight hundred seventy-six thousand, five hundred forty-five".