649558117 has 8 divisors (see below), whose sum is σ = 740672856. Its totient is φ = 564321792.

The previous prime is 649558109. The next prime is 649558163. The reversal of 649558117 is 711855946.

It can be written as a sum of positive squares in 4 ways, for example, as 243172836 + 406385281 = 15594^2 + 20159^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 649558117 - 2³ = 649558109 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (649558177) 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 in 7 ways as a sum of consecutive naturals, for example, 1469368 + ... + 1469809.

It is an arithmetic number, because the mean of its divisors is an integer number (92584107).

Almost surely, 2^649558117 is an apocalyptic number.

It is an amenable number.

649558117 is a deficient number, since it is larger than the sum of its proper divisors (91114739).

649558117 is a wasteful number, since it uses less digits than its factorization.

649558117 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2939207.

The product of its digits is 302400, while the sum is 46.

The square root of 649558117 is about 25486.4300560122. The cubic root of 649558117 is about 866.0427652860.

The spelling of 649558117 in words is "six hundred forty-nine million, five hundred fifty-eight thousand, one hundred seventeen".