648245623 has 2 divisors, whose sum is σ = 648245624. Its totient is φ = 648245622.

The previous prime is 648245579. The next prime is 648245677. The reversal of 648245623 is 326542846.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 648245623 - 2⁹ = 648245111 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (648245723) 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, 324122811 + 324122812.

It is an arithmetic number, because the mean of its divisors is an integer number (324122812).

Almost surely, 2^648245623 is an apocalyptic number.

648245623 is a deficient number, since it is larger than the sum of its proper divisors (1).

648245623 is an equidigital number, since it uses as much as digits as its factorization.

648245623 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 276480, while the sum is 40.

The square root of 648245623 is about 25460.6681569828. The cubic root of 648245623 is about 865.4590646895.

The spelling of 648245623 in words is "six hundred forty-eight million, two hundred forty-five thousand, six hundred twenty-three".