648541429 has 2 divisors, whose sum is σ = 648541430. Its totient is φ = 648541428.

The previous prime is 648541379. The next prime is 648541469. The reversal of 648541429 is 924145846.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 331167204 + 317374225 = 18198^2 + 17815^2 .

It is a cyclic number.

It is not a de Polignac number, because 648541429 - 2⁹ = 648540917 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (648541469) 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, 324270714 + 324270715.

It is an arithmetic number, because the mean of its divisors is an integer number (324270715).

Almost surely, 2^648541429 is an apocalyptic number.

It is an amenable number.

648541429 is a deficient number, since it is larger than the sum of its proper divisors (1).

648541429 is an equidigital number, since it uses as much as digits as its factorization.

648541429 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 276480, while the sum is 43.

The square root of 648541429 is about 25466.4765721527. The cubic root of 648541429 is about 865.5906861226.

The spelling of 648541429 in words is "six hundred forty-eight million, five hundred forty-one thousand, four hundred twenty-nine".