648282643 has 2 divisors, whose sum is σ = 648282644. Its totient is φ = 648282642.

The previous prime is 648282637. The next prime is 648282647. The reversal of 648282643 is 346282846.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 648282643 - 2²⁹ = 111411731 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 648282643.

It is not a weakly prime, because it can be changed into another prime (648282647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 324141321 + 324141322.

It is an arithmetic number, because the mean of its divisors is an integer number (324141322).

Almost surely, 2^648282643 is an apocalyptic number.

648282643 is a deficient number, since it is larger than the sum of its proper divisors (1).

648282643 is an equidigital number, since it uses as much as digits as its factorization.

648282643 is an evil number, because the sum of its binary digits is even.

The product of its digits is 442368, while the sum is 43.

The square root of 648282643 is about 25461.3951503055. The cubic root of 648282643 is about 865.4755392498.

The spelling of 648282643 in words is "six hundred forty-eight million, two hundred eighty-two thousand, six hundred forty-three".