647404267 has 2 divisors, whose sum is σ = 647404268. Its totient is φ = 647404266.

The previous prime is 647404229. The next prime is 647404283. The reversal of 647404267 is 762404746.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 647404267 - 2⁷ = 647404139 is a prime.

It is not a weakly prime, because it can be changed into another prime (647404567) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 323702133 + 323702134.

It is an arithmetic number, because the mean of its divisors is an integer number (323702134).

Almost surely, 2^647404267 is an apocalyptic number.

647404267 is a deficient number, since it is larger than the sum of its proper divisors (1).

647404267 is an equidigital number, since it uses as much as digits as its factorization.

647404267 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 225792, while the sum is 40.

The square root of 647404267 is about 25444.1401308828. The cubic root of 647404267 is about 865.0844770314.

The spelling of 647404267 in words is "six hundred forty-seven million, four hundred four thousand, two hundred sixty-seven".