648956843 has 2 divisors, whose sum is σ = 648956844. Its totient is φ = 648956842.

The previous prime is 648956813. The next prime is 648956849. The reversal of 648956843 is 348659846.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 648956843 - 2⁶ = 648956779 is a prime.

It is a super-2 number, since 2×648956843² = 842289968153053298, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (648956849) 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, 324478421 + 324478422.

It is an arithmetic number, because the mean of its divisors is an integer number (324478422).

Almost surely, 2^648956843 is an apocalyptic number.

648956843 is a deficient number, since it is larger than the sum of its proper divisors (1).

648956843 is an equidigital number, since it uses as much as digits as its factorization.

648956843 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4976640, while the sum is 53.

The square root of 648956843 is about 25474.6313614152. The cubic root of 648956843 is about 865.7754606161.

The spelling of 648956843 in words is "six hundred forty-eight million, nine hundred fifty-six thousand, eight hundred forty-three".