102643356979 has 2 divisors, whose sum is σ = 102643356980. Its totient is φ = 102643356978.

The previous prime is 102643356941. The next prime is 102643356997. The reversal of 102643356979 is 979653346201.

Together with next prime (102643356997) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 102643356979 - 2¹⁵ = 102643324211 is a prime.

It is not a weakly prime, because it can be changed into another prime (102643356479) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51321678489 + 51321678490.

It is an arithmetic number, because the mean of its divisors is an integer number (51321678490).

Almost surely, 2^102643356979 is an apocalyptic number.

102643356979 is a deficient number, since it is larger than the sum of its proper divisors (1).

102643356979 is an equidigital number, since it uses as much as digits as its factorization.

102643356979 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7348320, while the sum is 55.

The spelling of 102643356979 in words is "one hundred two billion, six hundred forty-three million, three hundred fifty-six thousand, nine hundred seventy-nine".