649150217 has 2 divisors, whose sum is σ = 649150218. Its totient is φ = 649150216.

The previous prime is 649150169. The next prime is 649150259. The reversal of 649150217 is 712051946.

649150217 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 606587641 + 42562576 = 24629^2 + 6524^2 .

It is a cyclic number.

It is not a de Polignac number, because 649150217 - 2⁸ = 649149961 is a prime.

It is a super-2 number, since 2×649150217² = 842792008462294178, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (649156217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 324575108 + 324575109.

It is an arithmetic number, because the mean of its divisors is an integer number (324575109).

Almost surely, 2^649150217 is an apocalyptic number.

It is an amenable number.

649150217 is a deficient number, since it is larger than the sum of its proper divisors (1).

649150217 is an equidigital number, since it uses as much as digits as its factorization.

649150217 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15120, while the sum is 35.

The square root of 649150217 is about 25478.4265016504. The cubic root of 649150217 is about 865.8614457062.

The spelling of 649150217 in words is "six hundred forty-nine million, one hundred fifty thousand, two hundred seventeen".