648305143 has 2 divisors, whose sum is σ = 648305144. Its totient is φ = 648305142.

The previous prime is 648305041. The next prime is 648305153. The reversal of 648305143 is 341503846.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 648305143 - 2²⁹ = 111434231 is a prime.

It is equal to p_33709903 and since 648305143 and 33709903 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 648305099 and 648305108.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (648305153) 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 as a sum of consecutive naturals, namely, 324152571 + 324152572.

It is an arithmetic number, because the mean of its divisors is an integer number (324152572).

Almost surely, 2^648305143 is an apocalyptic number.

648305143 is a deficient number, since it is larger than the sum of its proper divisors (1).

648305143 is an equidigital number, since it uses as much as digits as its factorization.

648305143 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 34560, while the sum is 34.

The square root of 648305143 is about 25461.8369918590. The cubic root of 648305143 is about 865.4855518446.

Adding to 648305143 its reverse (341503846), we get a palindrome (989808989).

The spelling of 648305143 in words is "six hundred forty-eight million, three hundred five thousand, one hundred forty-three".