648239123 has 8 divisors (see below), whose sum is σ = 741226080. Its totient is φ = 555347520.

The previous prime is 648239089. The next prime is 648239167. The reversal of 648239123 is 321932846.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 648239123 - 2⁸ = 648238867 is a prime.

It is not an unprimeable number, because it can be changed into a prime (648239173) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8618 + ... + 37023.

It is an arithmetic number, because the mean of its divisors is an integer number (92653260).

Almost surely, 2^648239123 is an apocalyptic number.

648239123 is a deficient number, since it is larger than the sum of its proper divisors (92986957).

648239123 is a wasteful number, since it uses less digits than its factorization.

648239123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47677.

The product of its digits is 62208, while the sum is 38.

The square root of 648239123 is about 25460.5405087952. The cubic root of 648239123 is about 865.4561720089.

The spelling of 648239123 in words is "six hundred forty-eight million, two hundred thirty-nine thousand, one hundred twenty-three".