649241641 has 2 divisors, whose sum is σ = 649241642. Its totient is φ = 649241640.

The previous prime is 649241603. The next prime is 649241693. The reversal of 649241641 is 146142946.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 411927616 + 237314025 = 20296^2 + 15405^2 .

It is a cyclic number.

It is not a de Polignac number, because 649241641 - 2⁹ = 649241129 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 649241641.

It is not a weakly prime, because it can be changed into another prime (649241141) 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, 324620820 + 324620821.

It is an arithmetic number, because the mean of its divisors is an integer number (324620821).

Almost surely, 2^649241641 is an apocalyptic number.

It is an amenable number.

649241641 is a deficient number, since it is larger than the sum of its proper divisors (1).

649241641 is an equidigital number, since it uses as much as digits as its factorization.

649241641 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 41472, while the sum is 37.

The square root of 649241641 is about 25480.2205838176. The cubic root of 649241641 is about 865.9020920768.

The spelling of 649241641 in words is "six hundred forty-nine million, two hundred forty-one thousand, six hundred forty-one".