649883513 has 2 divisors, whose sum is σ = 649883514. Its totient is φ = 649883512.

The previous prime is 649883501. The next prime is 649883539. The reversal of 649883513 is 315388946.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 631667689 + 18215824 = 25133^2 + 4268^2 .

It is a cyclic number.

It is not a de Polignac number, because 649883513 - 2²⁶ = 582774649 is a prime.

It is not a weakly prime, because it can be changed into another prime (649883713) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 324941756 + 324941757.

It is an arithmetic number, because the mean of its divisors is an integer number (324941757).

Almost surely, 2^649883513 is an apocalyptic number.

It is an amenable number.

649883513 is a deficient number, since it is larger than the sum of its proper divisors (1).

649883513 is an equidigital number, since it uses as much as digits as its factorization.

649883513 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 622080, while the sum is 47.

The square root of 649883513 is about 25492.8129675797. The cubic root of 649883513 is about 866.1873557906.

The spelling of 649883513 in words is "six hundred forty-nine million, eight hundred eighty-three thousand, five hundred thirteen".