206434045 has 8 divisors (see below), whose sum is σ = 248347224. Its totient is φ = 164729664.

The previous prime is 206434003. The next prime is 206434061. The reversal of 206434045 is 540434602.

It can be written as a sum of positive squares in 4 ways, for example, as 20548089 + 185885956 = 4533^2 + 13634^2 .

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 206434045 - 2¹³ = 206425853 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50014 + ... + 53983.

It is an arithmetic number, because the mean of its divisors is an integer number (31043403).

Almost surely, 2^206434045 is an apocalyptic number.

It is an amenable number.

206434045 is a deficient number, since it is larger than the sum of its proper divisors (41913179).

206434045 is a wasteful number, since it uses less digits than its factorization.

206434045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104399.

The product of its (nonzero) digits is 11520, while the sum is 28.

The square root of 206434045 is about 14367.8128119766. The cubic root of 206434045 is about 591.0085641360.

Adding to 206434045 its reverse (540434602), we get a palindrome (746868647).

The spelling of 206434045 in words is "two hundred six million, four hundred thirty-four thousand, forty-five".