649120447 has 2 divisors, whose sum is σ = 649120448. Its totient is φ = 649120446.

The previous prime is 649120441. The next prime is 649120457. The reversal of 649120447 is 744021946.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 649120447 - 2¹¹ = 649118399 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (649120441) 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, 324560223 + 324560224.

It is an arithmetic number, because the mean of its divisors is an integer number (324560224).

Almost surely, 2^649120447 is an apocalyptic number.

649120447 is a deficient number, since it is larger than the sum of its proper divisors (1).

649120447 is an equidigital number, since it uses as much as digits as its factorization.

649120447 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48384, while the sum is 37.

The square root of 649120447 is about 25477.8422752006. The cubic root of 649120447 is about 865.8482093814.

The spelling of 649120447 in words is "six hundred forty-nine million, one hundred twenty thousand, four hundred forty-seven".