648311017 has 2 divisors, whose sum is σ = 648311018. Its totient is φ = 648311016.

The previous prime is 648310991. The next prime is 648311023. The reversal of 648311017 is 710113846.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 436433881 + 211877136 = 20891^2 + 14556^2 .

It is a cyclic number.

It is not a de Polignac number, because 648311017 - 2¹⁹ = 647786729 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 648311017.

It is not a weakly prime, because it can be changed into another prime (648311087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 324155508 + 324155509.

It is an arithmetic number, because the mean of its divisors is an integer number (324155509).

Almost surely, 2^648311017 is an apocalyptic number.

It is an amenable number.

648311017 is a deficient number, since it is larger than the sum of its proper divisors (1).

648311017 is an equidigital number, since it uses as much as digits as its factorization.

648311017 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4032, while the sum is 31.

The square root of 648311017 is about 25461.9523406985. The cubic root of 648311017 is about 865.4881657612.

The spelling of 648311017 in words is "six hundred forty-eight million, three hundred eleven thousand, seventeen".