648004319 has 2 divisors, whose sum is σ = 648004320. Its totient is φ = 648004318.

The previous prime is 648004309. The next prime is 648004339. The reversal of 648004319 is 913400846.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-648004319 is a prime.

It is a super-2 number, since 2×648004319² = 839819194885307522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (648004309) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 324002159 + 324002160.

It is an arithmetic number, because the mean of its divisors is an integer number (324002160).

Almost surely, 2^648004319 is an apocalyptic number.

648004319 is a deficient number, since it is larger than the sum of its proper divisors (1).

648004319 is an equidigital number, since it uses as much as digits as its factorization.

648004319 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20736, while the sum is 35.

The square root of 648004319 is about 25455.9289557462. The cubic root of 648004319 is about 865.3516647345.

The spelling of 648004319 in words is "six hundred forty-eight million, four thousand, three hundred nineteen".