647384267 has 2 divisors, whose sum is σ = 647384268. Its totient is φ = 647384266.

The previous prime is 647384261. The next prime is 647384279. The reversal of 647384267 is 762483746.

647384267 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 647384267 - 2⁶ = 647384203 is a prime.

It is not a weakly prime, because it can be changed into another prime (647384261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 323692133 + 323692134.

It is an arithmetic number, because the mean of its divisors is an integer number (323692134).

Almost surely, 2^647384267 is an apocalyptic number.

647384267 is a deficient number, since it is larger than the sum of its proper divisors (1).

647384267 is an equidigital number, since it uses as much as digits as its factorization.

647384267 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1354752, while the sum is 47.

The square root of 647384267 is about 25443.7471100465. The cubic root of 647384267 is about 865.0755687039.

The spelling of 647384267 in words is "six hundred forty-seven million, three hundred eighty-four thousand, two hundred sixty-seven".