647393267 has 2 divisors, whose sum is σ = 647393268. Its totient is φ = 647393266.

The previous prime is 647393261. The next prime is 647393281. The reversal of 647393267 is 762393746.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 647393267 - 2⁸ = 647393011 is a prime.

It is not a weakly prime, because it can be changed into another prime (647393261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 323696633 + 323696634.

It is an arithmetic number, because the mean of its divisors is an integer number (323696634).

Almost surely, 2^647393267 is an apocalyptic number.

647393267 is a deficient number, since it is larger than the sum of its proper divisors (1).

647393267 is an equidigital number, since it uses as much as digits as its factorization.

647393267 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1143072, while the sum is 47.

The square root of 647393267 is about 25443.9239701741. The cubic root of 647393267 is about 865.0795774740.

The spelling of 647393267 in words is "six hundred forty-seven million, three hundred ninety-three thousand, two hundred sixty-seven".