206428267 has 4 divisors (see below), whose sum is σ = 206467776. Its totient is φ = 206388760.

The previous prime is 206428259. The next prime is 206428279. The reversal of 206428267 is 762824602.

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

It is a cyclic number.

It is not a de Polignac number, because 206428267 - 2³ = 206428259 is a prime.

It is a super-2 number, since 2×206428267² = 85225258833246578, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (206428237) 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, 10459 + ... + 22852.

It is an arithmetic number, because the mean of its divisors is an integer number (51616944).

Almost surely, 2^206428267 is an apocalyptic number.

206428267 is a deficient number, since it is larger than the sum of its proper divisors (39509).

206428267 is an equidigital number, since it uses as much as digits as its factorization.

206428267 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39508.

The product of its (nonzero) digits is 64512, while the sum is 37.

The square root of 206428267 is about 14367.6117361237. The cubic root of 206428267 is about 591.0030500595.

The spelling of 206428267 in words is "two hundred six million, four hundred twenty-eight thousand, two hundred sixty-seven".