648213341 has 2 divisors, whose sum is σ = 648213342. Its totient is φ = 648213340.

The previous prime is 648213287. The next prime is 648213343. The reversal of 648213341 is 143312846.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 554414116 + 93799225 = 23546^2 + 9685^2 .

It is a cyclic number.

It is not a de Polignac number, because 648213341 - 2⁶ = 648213277 is a prime.

Together with 648213343, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 648213298 and 648213307.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (648213343) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 324106670 + 324106671.

It is an arithmetic number, because the mean of its divisors is an integer number (324106671).

Almost surely, 2^648213341 is an apocalyptic number.

It is an amenable number.

648213341 is a deficient number, since it is larger than the sum of its proper divisors (1).

648213341 is an equidigital number, since it uses as much as digits as its factorization.

648213341 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13824, while the sum is 32.

The square root of 648213341 is about 25460.0341908647. The cubic root of 648213341 is about 865.4446981118. Note that the first 3 decimals are identical.

The spelling of 648213341 in words is "six hundred forty-eight million, two hundred thirteen thousand, three hundred forty-one".