206930945 has 16 divisors (see below), whose sum is σ = 269072832. Its totient is φ = 151865280.

The previous prime is 206930909. The next prime is 206930947. The reversal of 206930945 is 549039602.

It is not a de Polignac number, because 206930945 - 2¹² = 206926849 is a prime.

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 206930899 and 206930908.

It is not an unprimeable number, because it can be changed into a prime (206930947) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 830 + ... + 20360.

It is an arithmetic number, because the mean of its divisors is an integer number (16817052).

Almost surely, 2^206930945 is an apocalyptic number.

It is an amenable number.

206930945 is a deficient number, since it is larger than the sum of its proper divisors (62141887).

206930945 is a wasteful number, since it uses less digits than its factorization.

206930945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19712.

The product of its (nonzero) digits is 58320, while the sum is 38.

The square root of 206930945 is about 14385.0945426160. The cubic root of 206930945 is about 591.4823826880.

The spelling of 206930945 in words is "two hundred six million, nine hundred thirty thousand, nine hundred forty-five".