206042939 has 2 divisors, whose sum is σ = 206042940. Its totient is φ = 206042938.

The previous prime is 206042911. The next prime is 206043001. The reversal of 206042939 is 939240602.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 206042939 - 2²⁴ = 189265723 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 206042899 and 206042908.

It is not a weakly prime, because it can be changed into another prime (206062939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103021469 + 103021470.

It is an arithmetic number, because the mean of its divisors is an integer number (103021470).

Almost surely, 2^206042939 is an apocalyptic number.

206042939 is a deficient number, since it is larger than the sum of its proper divisors (1).

206042939 is an equidigital number, since it uses as much as digits as its factorization.

206042939 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23328, while the sum is 35.

The square root of 206042939 is about 14354.1958674110. The cubic root of 206042939 is about 590.6350903309.

The spelling of 206042939 in words is "two hundred six million, forty-two thousand, nine hundred thirty-nine".