206183945 has 16 divisors (see below), whose sum is σ = 278622720. Its totient is φ = 145113600.

The previous prime is 206183941. The next prime is 206183951. The reversal of 206183945 is 549381602.

It is a happy number.

It is not a de Polignac number, because 206183945 - 2² = 206183941 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 206183899 and 206183908.

It is not an unprimeable number, because it can be changed into a prime (206183941) 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 15 ways as a sum of consecutive naturals, for example, 58760 + ... + 62169.

It is an arithmetic number, because the mean of its divisors is an integer number (17413920).

Almost surely, 2^206183945 is an apocalyptic number.

It is an amenable number.

206183945 is a deficient number, since it is larger than the sum of its proper divisors (72438775).

206183945 is a wasteful number, since it uses less digits than its factorization.

206183945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120976.

The product of its (nonzero) digits is 51840, while the sum is 38.

The square root of 206183945 is about 14359.1066922702. The cubic root of 206183945 is about 590.7697938071.

The spelling of 206183945 in words is "two hundred six million, one hundred eighty-three thousand, nine hundred forty-five".