206605473 has 4 divisors (see below), whose sum is σ = 275473968. Its totient is φ = 137736980.

The previous prime is 206605463. The next prime is 206605489. The reversal of 206605473 is 374506602.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 206605473 - 2⁴ = 206605457 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (206605463) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34434243 + ... + 34434248.

It is an arithmetic number, because the mean of its divisors is an integer number (68868492).

Almost surely, 2^206605473 is an apocalyptic number.

It is an amenable number.

206605473 is a deficient number, since it is larger than the sum of its proper divisors (68868495).

206605473 is an equidigital number, since it uses as much as digits as its factorization.

206605473 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68868494.

The product of its (nonzero) digits is 30240, while the sum is 33.

The square root of 206605473 is about 14373.7772697367. Note that the first 3 decimals coincide. The cubic root of 206605473 is about 591.1721149755.

The spelling of 206605473 in words is "two hundred six million, six hundred five thousand, four hundred seventy-three".