647006863 has 2 divisors, whose sum is σ = 647006864. Its totient is φ = 647006862.

The previous prime is 647006861. The next prime is 647006897. The reversal of 647006863 is 368600746.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 647006863 - 2¹ = 647006861 is a prime.

Together with 647006861, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (647006861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 323503431 + 323503432.

It is an arithmetic number, because the mean of its divisors is an integer number (323503432).

Almost surely, 2^647006863 is an apocalyptic number.

647006863 is a deficient number, since it is larger than the sum of its proper divisors (1).

647006863 is an equidigital number, since it uses as much as digits as its factorization.

647006863 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 145152, while the sum is 40.

The square root of 647006863 is about 25436.3295897816. The cubic root of 647006863 is about 864.9074323743.

The spelling of 647006863 in words is "six hundred forty-seven million, six thousand, eight hundred sixty-three".