206394445 has 4 divisors (see below), whose sum is σ = 247673340. Its totient is φ = 165115552.

The previous prime is 206394427. The next prime is 206394457. The reversal of 206394445 is 544493602.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 31573161 + 174821284 = 5619^2 + 13222^2 .

It is a cyclic number.

It is not a de Polignac number, because 206394445 - 2⁷ = 206394317 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20639440 + ... + 20639449.

It is an arithmetic number, because the mean of its divisors is an integer number (61918335).

Almost surely, 2^206394445 is an apocalyptic number.

It is an amenable number.

206394445 is a deficient number, since it is larger than the sum of its proper divisors (41278895).

206394445 is an equidigital number, since it uses as much as digits as its factorization.

206394445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41278894.

The product of its (nonzero) digits is 103680, while the sum is 37.

The square root of 206394445 is about 14366.4346655668. The cubic root of 206394445 is about 590.9707708934.

The spelling of 206394445 in words is "two hundred six million, three hundred ninety-four thousand, four hundred forty-five".