648642223 has 2 divisors, whose sum is σ = 648642224. Its totient is φ = 648642222.

The previous prime is 648642199. The next prime is 648642257. The reversal of 648642223 is 322246846.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 648642223 - 2²⁵ = 615087791 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (648642923) 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, 324321111 + 324321112.

It is an arithmetic number, because the mean of its divisors is an integer number (324321112).

Almost surely, 2^648642223 is an apocalyptic number.

648642223 is a deficient number, since it is larger than the sum of its proper divisors (1).

648642223 is an equidigital number, since it uses as much as digits as its factorization.

648642223 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 110592, while the sum is 37.

The square root of 648642223 is about 25468.4554498305. The cubic root of 648642223 is about 865.6355261406.

The spelling of 648642223 in words is "six hundred forty-eight million, six hundred forty-two thousand, two hundred twenty-three".