206380919 has 4 divisors (see below), whose sum is σ = 213038400. Its totient is φ = 199723440.

The previous prime is 206380913. The next prime is 206380939. The reversal of 206380919 is 919083602.

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 206380919 - 2⁴ = 206380903 is a prime.

It is a super-2 number, since 2×206380919² = 85186167454569122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (206380913) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3328694 + ... + 3328755.

It is an arithmetic number, because the mean of its divisors is an integer number (53259600).

Almost surely, 2^206380919 is an apocalyptic number.

206380919 is a deficient number, since it is larger than the sum of its proper divisors (6657481).

206380919 is an equidigital number, since it uses as much as digits as its factorization.

206380919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6657480.

The product of its (nonzero) digits is 23328, while the sum is 38.

The square root of 206380919 is about 14365.9639077926. The cubic root of 206380919 is about 590.9578609121.

The spelling of 206380919 in words is "two hundred six million, three hundred eighty thousand, nine hundred nineteen".