206843390739 has 6 divisors (see below), whose sum is σ = 298773786636. Its totient is φ = 137895593820.

The previous prime is 206843390701. The next prime is 206843390749. The reversal of 206843390739 is 937093348602.

206843390739 is a `hidden beast` number, since 206 + 8 + 43 + 390 + 7 + 3 + 9 = 666.

It is not a de Polignac number, because 206843390739 - 2⁸ = 206843390483 is a prime.

It is a super-2 number, since 2×206843390739² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (206843390749) 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 5 ways as a sum of consecutive naturals, for example, 11491299477 + ... + 11491299494.

It is an arithmetic number, because the mean of its divisors is an integer number (49795631106).

Almost surely, 2^206843390739 is an apocalyptic number.

206843390739 is a deficient number, since it is larger than the sum of its proper divisors (91930395897).

206843390739 is a wasteful number, since it uses less digits than its factorization.

206843390739 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22982598977 (or 22982598974 counting only the distinct ones).

The product of its (nonzero) digits is 5878656, while the sum is 54.

The spelling of 206843390739 in words is "two hundred six billion, eight hundred forty-three million, three hundred ninety thousand, seven hundred thirty-nine".