649937567 has 2 divisors, whose sum is σ = 649937568. Its totient is φ = 649937566.

The previous prime is 649937551. The next prime is 649937609. The reversal of 649937567 is 765739946.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 649937567 - 2⁴ = 649937551 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (649931567) 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, 324968783 + 324968784.

It is an arithmetic number, because the mean of its divisors is an integer number (324968784).

Almost surely, 2^649937567 is an apocalyptic number.

649937567 is a deficient number, since it is larger than the sum of its proper divisors (1).

649937567 is an equidigital number, since it uses as much as digits as its factorization.

649937567 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8573040, while the sum is 56.

The square root of 649937567 is about 25493.8731266946. The cubic root of 649937567 is about 866.2113701421.

The spelling of 649937567 in words is "six hundred forty-nine million, nine hundred thirty-seven thousand, five hundred sixty-seven".