206230139 has 2 divisors, whose sum is σ = 206230140. Its totient is φ = 206230138.

The previous prime is 206230117. The next prime is 206230147. The reversal of 206230139 is 931032602.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 206230139 - 2¹⁶ = 206164603 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (206230109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103115069 + 103115070.

It is an arithmetic number, because the mean of its divisors is an integer number (103115070).

Almost surely, 2^206230139 is an apocalyptic number.

206230139 is a deficient number, since it is larger than the sum of its proper divisors (1).

206230139 is an equidigital number, since it uses as much as digits as its factorization.

206230139 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1944, while the sum is 26.

The square root of 206230139 is about 14360.7151284328. The cubic root of 206230139 is about 590.8139097252.

The spelling of 206230139 in words is "two hundred six million, two hundred thirty thousand, one hundred thirty-nine".