647911883 has 2 divisors, whose sum is σ = 647911884. Its totient is φ = 647911882.

The previous prime is 647911853. The next prime is 647911931. The reversal of 647911883 is 388119746.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 647911883 - 2²² = 643717579 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (647911813) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 323955941 + 323955942.

It is an arithmetic number, because the mean of its divisors is an integer number (323955942).

Almost surely, 2^647911883 is an apocalyptic number.

647911883 is a deficient number, since it is larger than the sum of its proper divisors (1).

647911883 is an equidigital number, since it uses as much as digits as its factorization.

647911883 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 290304, while the sum is 47.

The square root of 647911883 is about 25454.1132825326. The cubic root of 647911883 is about 865.3105161146.

The spelling of 647911883 in words is "six hundred forty-seven million, nine hundred eleven thousand, eight hundred eighty-three".