648019 has 2 divisors, whose sum is σ = 648020. Its totient is φ = 648018.

The previous prime is 648007. The next prime is 648029. The reversal of 648019 is 910846.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 648019 - 2⁵ = 647987 is a prime.

It is a super-2 number, since 2×648019² = 839857248722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (648029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 324009 + 324010.

It is an arithmetic number, because the mean of its divisors is an integer number (324010).

2⁶⁴⁸⁰¹⁹ is an apocalyptic number.

648019 is a deficient number, since it is larger than the sum of its proper divisors (1).

648019 is an equidigital number, since it uses as much as digits as its factorization.

648019 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 648019 is about 804.9962732833. The cubic root of 648019 is about 86.5358199738.

The spelling of 648019 in words is "six hundred forty-eight thousand, nineteen".