648757073 has 4 divisors (see below), whose sum is σ = 648972900. Its totient is φ = 648541248.

The previous prime is 648757013. The next prime is 648757129. The reversal of 648757073 is 370757846.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 409374289 + 239382784 = 20233^2 + 15472^2 .

It is a cyclic number.

It is not a de Polignac number, because 648757073 - 2¹⁰ = 648756049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (648757013) 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, 103340 + ... + 109437.

It is an arithmetic number, because the mean of its divisors is an integer number (162243225).

Almost surely, 2^648757073 is an apocalyptic number.

It is an amenable number.

648757073 is a deficient number, since it is larger than the sum of its proper divisors (215827).

648757073 is a wasteful number, since it uses less digits than its factorization.

648757073 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 215826.

The product of its (nonzero) digits is 987840, while the sum is 47.

The square root of 648757073 is about 25470.7101000345. The cubic root of 648757073 is about 865.6866135606.

The spelling of 648757073 in words is "six hundred forty-eight million, seven hundred fifty-seven thousand, seventy-three".