648289 has 2 divisors, whose sum is σ = 648290. Its totient is φ = 648288.

The previous prime is 648283. The next prime is 648293. The reversal of 648289 is 982846.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 627264 + 21025 = 792^2 + 145^2 .

It is a cyclic number.

It is not a de Polignac number, because 648289 - 2⁵ = 648257 is a prime.

It is not a weakly prime, because it can be changed into another prime (648283) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 324144 + 324145.

It is an arithmetic number, because the mean of its divisors is an integer number (324145).

2⁶⁴⁸²⁸⁹ is an apocalyptic number.

It is an amenable number.

648289 is a deficient number, since it is larger than the sum of its proper divisors (1).

648289 is an equidigital number, since it uses as much as digits as its factorization.

648289 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 27648, while the sum is 37.

The square root of 648289 is about 805.1639584582. The cubic root of 648289 is about 86.5478368165.

The spelling of 648289 in words is "six hundred forty-eight thousand, two hundred eighty-nine".