648282289 has 2 divisors, whose sum is σ = 648282290. Its totient is φ = 648282288.

The previous prime is 648282259. The next prime is 648282293. The reversal of 648282289 is 982282846.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 645160000 + 3122289 = 25400^2 + 1767^2 .

It is a cyclic number.

It is not a de Polignac number, because 648282289 - 2²⁵ = 614727857 is a prime.

It is not a weakly prime, because it can be changed into another prime (648282259) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 324141144 + 324141145.

It is an arithmetic number, because the mean of its divisors is an integer number (324141145).

Almost surely, 2^648282289 is an apocalyptic number.

It is an amenable number.

648282289 is a deficient number, since it is larger than the sum of its proper divisors (1).

648282289 is an equidigital number, since it uses as much as digits as its factorization.

648282289 is an evil number, because the sum of its binary digits is even.

The product of its digits is 884736, while the sum is 49.

The square root of 648282289 is about 25461.3881986038. The cubic root of 648282289 is about 865.4753817164.

The spelling of 648282289 in words is "six hundred forty-eight million, two hundred eighty-two thousand, two hundred eighty-nine".