647437223 has 2 divisors, whose sum is σ = 647437224. Its totient is φ = 647437222.

The previous prime is 647437213. The next prime is 647437247. The reversal of 647437223 is 322734746.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 647437223 - 2¹⁶ = 647371687 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (647437213) 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, 323718611 + 323718612.

It is an arithmetic number, because the mean of its divisors is an integer number (323718612).

Almost surely, 2^647437223 is an apocalyptic number.

647437223 is a deficient number, since it is larger than the sum of its proper divisors (1).

647437223 is an equidigital number, since it uses as much as digits as its factorization.

647437223 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 169344, while the sum is 38.

The square root of 647437223 is about 25444.7877373736. The cubic root of 647437223 is about 865.0991557733.

The spelling of 647437223 in words is "six hundred forty-seven million, four hundred thirty-seven thousand, two hundred twenty-three".