206989498979 has 2 divisors, whose sum is σ = 206989498980. Its totient is φ = 206989498978.

The previous prime is 206989498973. The next prime is 206989499077. The reversal of 206989498979 is 979894989602.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-206989498979 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (206989498973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103494749489 + 103494749490.

It is an arithmetic number, because the mean of its divisors is an integer number (103494749490).

Almost surely, 2^206989498979 is an apocalyptic number.

206989498979 is a deficient number, since it is larger than the sum of its proper divisors (1).

206989498979 is an equidigital number, since it uses as much as digits as its factorization.

206989498979 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1269789696, while the sum is 80.

The spelling of 206989498979 in words is "two hundred six billion, nine hundred eighty-nine million, four hundred ninety-eight thousand, nine hundred seventy-nine".