648842371 has 2 divisors, whose sum is σ = 648842372. Its totient is φ = 648842370.

The previous prime is 648842357. The next prime is 648842387. The reversal of 648842371 is 173248846.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 648842371 - 2⁵ = 648842339 is a prime.

It is not a weakly prime, because it can be changed into another prime (648842771) 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, 324421185 + 324421186.

It is an arithmetic number, because the mean of its divisors is an integer number (324421186).

Almost surely, 2^648842371 is an apocalyptic number.

648842371 is a deficient number, since it is larger than the sum of its proper divisors (1).

648842371 is an equidigital number, since it uses as much as digits as its factorization.

648842371 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 258048, while the sum is 43.

The square root of 648842371 is about 25472.3844780971. The cubic root of 648842371 is about 865.7245517987.

The spelling of 648842371 in words is "six hundred forty-eight million, eight hundred forty-two thousand, three hundred seventy-one".