647061763 has 2 divisors, whose sum is σ = 647061764. Its totient is φ = 647061762.

The previous prime is 647061757. The next prime is 647061781. The reversal of 647061763 is 367160746.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 647061763 - 2⁵ = 647061731 is a prime.

It is not a weakly prime, because it can be changed into another prime (647061563) 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, 323530881 + 323530882.

It is an arithmetic number, because the mean of its divisors is an integer number (323530882).

Almost surely, 2^647061763 is an apocalyptic number.

647061763 is a deficient number, since it is larger than the sum of its proper divisors (1).

647061763 is an equidigital number, since it uses as much as digits as its factorization.

647061763 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 127008, while the sum is 40.

The square root of 647061763 is about 25437.4087320230. The cubic root of 647061763 is about 864.9318948016.

The spelling of 647061763 in words is "six hundred forty-seven million, sixty-one thousand, seven hundred sixty-three".