648370441 has 2 divisors, whose sum is σ = 648370442. Its totient is φ = 648370440.

The previous prime is 648370439. The next prime is 648370501. The reversal of 648370441 is 144073846.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 372644416 + 275726025 = 19304^2 + 16605^2 .

It is a cyclic number.

It is not a de Polignac number, because 648370441 - 2¹ = 648370439 is a prime.

Together with 648370439, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 648370441.

It is not a weakly prime, because it can be changed into another prime (648370241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 324185220 + 324185221.

It is an arithmetic number, because the mean of its divisors is an integer number (324185221).

Almost surely, 2^648370441 is an apocalyptic number.

It is an amenable number.

648370441 is a deficient number, since it is larger than the sum of its proper divisors (1).

648370441 is an equidigital number, since it uses as much as digits as its factorization.

648370441 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 64512, while the sum is 37.

The square root of 648370441 is about 25463.1192315474. The cubic root of 648370441 is about 865.5146084182.

The spelling of 648370441 in words is "six hundred forty-eight million, three hundred seventy thousand, four hundred forty-one".