646383713 has 2 divisors, whose sum is σ = 646383714. Its totient is φ = 646383712.

The previous prime is 646383709. The next prime is 646383733. The reversal of 646383713 is 317383646.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 637663504 + 8720209 = 25252^2 + 2953^2 .

It is a cyclic number.

It is not a de Polignac number, because 646383713 - 2² = 646383709 is a prime.

It is not a weakly prime, because it can be changed into another prime (646383733) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 323191856 + 323191857.

It is an arithmetic number, because the mean of its divisors is an integer number (323191857).

Almost surely, 2^646383713 is an apocalyptic number.

It is an amenable number.

646383713 is a deficient number, since it is larger than the sum of its proper divisors (1).

646383713 is an equidigital number, since it uses as much as digits as its factorization.

646383713 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 217728, while the sum is 41.

The square root of 646383713 is about 25424.0774267229. The cubic root of 646383713 is about 864.6296711834.

The spelling of 646383713 in words is "six hundred forty-six million, three hundred eighty-three thousand, seven hundred thirteen".