647190223 has 2 divisors, whose sum is σ = 647190224. Its totient is φ = 647190222.

The previous prime is 647190191. The next prime is 647190227. The reversal of 647190223 is 322091746.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 647190223 - 2⁵ = 647190191 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (647190227) 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, 323595111 + 323595112.

It is an arithmetic number, because the mean of its divisors is an integer number (323595112).

Almost surely, 2^647190223 is an apocalyptic number.

647190223 is a deficient number, since it is larger than the sum of its proper divisors (1).

647190223 is an equidigital number, since it uses as much as digits as its factorization.

647190223 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18144, while the sum is 34.

The square root of 647190223 is about 25439.9336280581. The cubic root of 647190223 is about 864.9891288019.

The spelling of 647190223 in words is "six hundred forty-seven million, one hundred ninety thousand, two hundred twenty-three".