647084512979 has 2 divisors, whose sum is σ = 647084512980. Its totient is φ = 647084512978.

The previous prime is 647084512891. The next prime is 647084512981. The reversal of 647084512979 is 979215480746.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 647084512979 - 2²⁴ = 647067735763 is a prime.

Together with 647084512981, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (647084512999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 323542256489 + 323542256490.

It is an arithmetic number, because the mean of its divisors is an integer number (323542256490).

Almost surely, 2^647084512979 is an apocalyptic number.

647084512979 is a deficient number, since it is larger than the sum of its proper divisors (1).

647084512979 is an equidigital number, since it uses as much as digits as its factorization.

647084512979 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 30481920, while the sum is 62.

The spelling of 647084512979 in words is "six hundred forty-seven billion, eighty-four million, five hundred twelve thousand, nine hundred seventy-nine".