206380139 has 8 divisors (see below), whose sum is σ = 236303328. Its totient is φ = 176567040.

The previous prime is 206380133. The next prime is 206380159. The reversal of 206380139 is 931083602.

206380139 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 206380139 - 2⁸ = 206379883 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (206380133) 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, 23462 + ... + 31035.

It is an arithmetic number, because the mean of its divisors is an integer number (29537916).

Almost surely, 2^206380139 is an apocalyptic number.

206380139 is a deficient number, since it is larger than the sum of its proper divisors (29923189).

206380139 is an equidigital number, since it uses as much as digits as its factorization.

206380139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55045.

The product of its (nonzero) digits is 7776, while the sum is 32.

The square root of 206380139 is about 14365.9367602673. The cubic root of 206380139 is about 590.9571164187.

The spelling of 206380139 in words is "two hundred six million, three hundred eighty thousand, one hundred thirty-nine".