649770559 has 2 divisors, whose sum is σ = 649770560. Its totient is φ = 649770558.

The previous prime is 649770553. The next prime is 649770581. The reversal of 649770559 is 955077946.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 649770559 - 2³ = 649770551 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (649770551) 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, 324885279 + 324885280.

It is an arithmetic number, because the mean of its divisors is an integer number (324885280).

Almost surely, 2^649770559 is an apocalyptic number.

649770559 is a deficient number, since it is larger than the sum of its proper divisors (1).

649770559 is an equidigital number, since it uses as much as digits as its factorization.

649770559 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2381400, while the sum is 52.

The square root of 649770559 is about 25490.5974625939. The cubic root of 649770559 is about 866.1371698760.

The spelling of 649770559 in words is "six hundred forty-nine million, seven hundred seventy thousand, five hundred fifty-nine".