206820039 has 8 divisors (see below), whose sum is σ = 276416752. Its totient is φ = 137551680.

The previous prime is 206820013. The next prime is 206820043. The reversal of 206820039 is 930028602.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 206820039 - 2⁷ = 206819911 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 206819988 and 206820015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (206820059) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 80614 + ... + 83139.

It is an arithmetic number, because the mean of its divisors is an integer number (34552094).

Almost surely, 2^206820039 is an apocalyptic number.

206820039 is a deficient number, since it is larger than the sum of its proper divisors (69596713).

206820039 is a wasteful number, since it uses less digits than its factorization.

206820039 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 164177.

The product of its (nonzero) digits is 5184, while the sum is 30.

The square root of 206820039 is about 14381.2391329816. The cubic root of 206820039 is about 591.3766941808.

The spelling of 206820039 in words is "two hundred six million, eight hundred twenty thousand, thirty-nine".