649104887 has 2 divisors, whose sum is σ = 649104888. Its totient is φ = 649104886.

The previous prime is 649104853. The next prime is 649104893. The reversal of 649104887 is 788401946.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 649104887 - 2¹⁰ = 649103863 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (649104817) 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, 324552443 + 324552444.

It is an arithmetic number, because the mean of its divisors is an integer number (324552444).

Almost surely, 2^649104887 is an apocalyptic number.

649104887 is a deficient number, since it is larger than the sum of its proper divisors (1).

649104887 is an equidigital number, since it uses as much as digits as its factorization.

649104887 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 387072, while the sum is 47.

The square root of 649104887 is about 25477.5369099919. The cubic root of 649104887 is about 865.8412909398.

The spelling of 649104887 in words is "six hundred forty-nine million, one hundred four thousand, eight hundred eighty-seven".