206934545 has 4 divisors (see below), whose sum is σ = 248321460. Its totient is φ = 165547632.

The previous prime is 206934493. The next prime is 206934547. The reversal of 206934545 is 545439602.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 545439602 = 2 ⋅272719801.

It can be written as a sum of positive squares in 2 ways, for example, as 135582736 + 71351809 = 11644^2 + 8447^2 .

It is a cyclic number.

It is not a de Polignac number, because 206934545 - 2¹⁰ = 206933521 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 206934499 and 206934508.

It is not an unprimeable number, because it can be changed into a prime (206934547) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20693450 + ... + 20693459.

It is an arithmetic number, because the mean of its divisors is an integer number (62080365).

Almost surely, 2^206934545 is an apocalyptic number.

It is an amenable number.

206934545 is a deficient number, since it is larger than the sum of its proper divisors (41386915).

206934545 is an equidigital number, since it uses as much as digits as its factorization.

206934545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41386914.

The product of its (nonzero) digits is 129600, while the sum is 38.

The square root of 206934545 is about 14385.2196715935. The cubic root of 206934545 is about 591.4858126958.

The spelling of 206934545 in words is "two hundred six million, nine hundred thirty-four thousand, five hundred forty-five".