648675871 has 2 divisors, whose sum is σ = 648675872. Its totient is φ = 648675870.

The previous prime is 648675869. The next prime is 648675889. The reversal of 648675871 is 178576846.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 648675871 - 2¹ = 648675869 is a prime.

Together with 648675869, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (648673871) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 324337935 + 324337936.

It is an arithmetic number, because the mean of its divisors is an integer number (324337936).

Almost surely, 2^648675871 is an apocalyptic number.

648675871 is a deficient number, since it is larger than the sum of its proper divisors (1).

648675871 is an equidigital number, since it uses as much as digits as its factorization.

648675871 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2257920, while the sum is 52.

The square root of 648675871 is about 25469.1160231367. The cubic root of 648675871 is about 865.6504940225.

The spelling of 648675871 in words is "six hundred forty-eight million, six hundred seventy-five thousand, eight hundred seventy-one".