206043617 has 12 divisors (see below), whose sum is σ = 225430380. Its totient is φ = 188218368.

The previous prime is 206043583. The next prime is 206043623. The reversal of 206043617 is 716340602.

It can be written as a sum of positive squares in 6 ways, for example, as 952576 + 205091041 = 976^2 + 14321^2 .

It is not a de Polignac number, because 206043617 - 2¹⁶ = 205978081 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 206043617.

It is not an unprimeable number, because it can be changed into a prime (206043647) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10109 + ... + 22677.

It is an arithmetic number, because the mean of its divisors is an integer number (18785865).

Almost surely, 2^206043617 is an apocalyptic number.

It is an amenable number.

206043617 is a deficient number, since it is larger than the sum of its proper divisors (19386763).

206043617 is a wasteful number, since it uses less digits than its factorization.

206043617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12692 (or 12679 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 29.

The square root of 206043617 is about 14354.2194841796. The cubic root of 206043617 is about 590.6357381734.

The spelling of 206043617 in words is "two hundred six million, forty-three thousand, six hundred seventeen".