206679976939 has 2 divisors, whose sum is σ = 206679976940. Its totient is φ = 206679976938.

The previous prime is 206679976903. The next prime is 206679976957. The reversal of 206679976939 is 939679976602.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 206679976939 - 2⁹ = 206679976427 is a prime.

It is a super-2 number, since 2×206679976939² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (206679976969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103339988469 + 103339988470.

It is an arithmetic number, because the mean of its divisors is an integer number (103339988470).

Almost surely, 2^206679976939 is an apocalyptic number.

206679976939 is a deficient number, since it is larger than the sum of its proper divisors (1).

206679976939 is an equidigital number, since it uses as much as digits as its factorization.

206679976939 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 416649744, while the sum is 73.

The spelling of 206679976939 in words is "two hundred six billion, six hundred seventy-nine million, nine hundred seventy-six thousand, nine hundred thirty-nine".