648202249 has 2 divisors, whose sum is σ = 648202250. Its totient is φ = 648202248.

The previous prime is 648202193. The next prime is 648202267. The reversal of 648202249 is 942202846.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 583560649 + 64641600 = 24157^2 + 8040^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-648202249 is a prime.

It is not a weakly prime, because it can be changed into another prime (648203249) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 324101124 + 324101125.

It is an arithmetic number, because the mean of its divisors is an integer number (324101125).

Almost surely, 2^648202249 is an apocalyptic number.

It is an amenable number.

648202249 is a deficient number, since it is larger than the sum of its proper divisors (1).

648202249 is an equidigital number, since it uses as much as digits as its factorization.

648202249 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 55296, while the sum is 37.

The square root of 648202249 is about 25459.8163583322. The cubic root of 648202249 is about 865.4397616880.

The spelling of 648202249 in words is "six hundred forty-eight million, two hundred two thousand, two hundred forty-nine".