648745017 has 4 divisors (see below), whose sum is σ = 864993360. Its totient is φ = 432496676.

The previous prime is 648744997. The next prime is 648745037. The reversal of 648745017 is 710547846.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (648744997) and next prime (648745037).

It is a cyclic number.

It is not a de Polignac number, because 648745017 - 2¹⁰ = 648743993 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 648745017.

It is not an unprimeable number, because it can be changed into a prime (648745037) 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 3 ways as a sum of consecutive naturals, for example, 108124167 + ... + 108124172.

It is an arithmetic number, because the mean of its divisors is an integer number (216248340).

Almost surely, 2^648745017 is an apocalyptic number.

It is an amenable number.

648745017 is a deficient number, since it is larger than the sum of its proper divisors (216248343).

648745017 is a wasteful number, since it uses less digits than its factorization.

648745017 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 216248342.

The product of its (nonzero) digits is 188160, while the sum is 42.

The square root of 648745017 is about 25470.4734349403. The cubic root of 648745017 is about 865.6812511104.

The spelling of 648745017 in words is "six hundred forty-eight million, seven hundred forty-five thousand, seventeen".