206445874 has 4 divisors (see below), whose sum is σ = 309668814. Its totient is φ = 103222936.

The previous prime is 206445851. The next prime is 206445893. The reversal of 206445874 is 478544602.

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 only one way, i.e., 204690249 + 1755625 = 14307^2 + 1325^2 .

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 as a sum of consecutive naturals, namely, 51611467 + ... + 51611470.

Almost surely, 2^206445874 is an apocalyptic number.

206445874 is a deficient number, since it is larger than the sum of its proper divisors (103222940).

206445874 is a wasteful number, since it uses less digits than its factorization.

206445874 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103222939.

The product of its (nonzero) digits is 215040, while the sum is 40.

The square root of 206445874 is about 14368.2244553737. The cubic root of 206445874 is about 591.0198524981.

The spelling of 206445874 in words is "two hundred six million, four hundred forty-five thousand, eight hundred seventy-four".