648833723 has 4 divisors (see below), whose sum is σ = 649129920. Its totient is φ = 648537528.

The previous prime is 648833707. The next prime is 648833737. The reversal of 648833723 is 327338846.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 327338846 = 2 ⋅163669423.

It is a cyclic number.

It is not a de Polignac number, because 648833723 - 2⁴ = 648833707 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (648833623) 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 in 3 ways as a sum of consecutive naturals, for example, 144788 + ... + 149201.

It is an arithmetic number, because the mean of its divisors is an integer number (162282480).

Almost surely, 2^648833723 is an apocalyptic number.

648833723 is a deficient number, since it is larger than the sum of its proper divisors (296197).

648833723 is a wasteful number, since it uses less digits than its factorization.

648833723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 296196.

The product of its digits is 580608, while the sum is 44.

The square root of 648833723 is about 25472.2147250686. The cubic root of 648833723 is about 865.7207055542.

The spelling of 648833723 in words is "six hundred forty-eight million, eight hundred thirty-three thousand, seven hundred twenty-three".