647364863 has 2 divisors, whose sum is σ = 647364864. Its totient is φ = 647364862.

The previous prime is 647364859. The next prime is 647364869. The reversal of 647364863 is 368463746.

647364863 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 647364863 - 2² = 647364859 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (647364869) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 323682431 + 323682432.

It is an arithmetic number, because the mean of its divisors is an integer number (323682432).

Almost surely, 2^647364863 is an apocalyptic number.

647364863 is a deficient number, since it is larger than the sum of its proper divisors (1).

647364863 is an equidigital number, since it uses as much as digits as its factorization.

647364863 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1741824, while the sum is 47.

The square root of 647364863 is about 25443.3657954289. The cubic root of 647364863 is about 865.0669256692.

The spelling of 647364863 in words is "six hundred forty-seven million, three hundred sixty-four thousand, eight hundred sixty-three".