647303473 has 2 divisors, whose sum is σ = 647303474. Its totient is φ = 647303472.

The previous prime is 647303453. The next prime is 647303507. The reversal of 647303473 is 374303746.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 342731169 + 304572304 = 18513^2 + 17452^2 .

It is a cyclic number.

It is not a de Polignac number, because 647303473 - 2¹⁷ = 647172401 is a prime.

It is not a weakly prime, because it can be changed into another prime (647303413) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 323651736 + 323651737.

It is an arithmetic number, because the mean of its divisors is an integer number (323651737).

Almost surely, 2^647303473 is an apocalyptic number.

It is an amenable number.

647303473 is a deficient number, since it is larger than the sum of its proper divisors (1).

647303473 is an equidigital number, since it uses as much as digits as its factorization.

647303473 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 127008, while the sum is 37.

The square root of 647303473 is about 25442.1593619724. The cubic root of 647303473 is about 865.0395798655.

The spelling of 647303473 in words is "six hundred forty-seven million, three hundred three thousand, four hundred seventy-three".