206983908739 has 16 divisors (see below), whose sum is σ = 216037527552. Its totient is φ = 198161395488.

The previous prime is 206983908721. The next prime is 206983908743. The reversal of 206983908739 is 937809389602.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 206983908739 - 2¹⁷ = 206983777667 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (206983908139) 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 15 ways as a sum of consecutive naturals, for example, 224937 + ... + 681589.

It is an arithmetic number, because the mean of its divisors is an integer number (13502345472).

Almost surely, 2^206983908739 is an apocalyptic number.

206983908739 is a deficient number, since it is larger than the sum of its proper divisors (9053618813).

206983908739 is a wasteful number, since it uses less digits than its factorization.

206983908739 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 456906.

The product of its (nonzero) digits is 35271936, while the sum is 64.

The spelling of 206983908739 in words is "two hundred six billion, nine hundred eighty-three million, nine hundred eight thousand, seven hundred thirty-nine".