649127133 has 12 divisors (see below), whose sum is σ = 992782908. Its totient is φ = 407295360.

The previous prime is 649127131. The next prime is 649127161. The reversal of 649127133 is 331721946.

649127133 is a `hidden beast` number, since 649 + 1 + 2 + 7 + 1 + 3 + 3 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 445294404 + 203832729 = 21102^2 + 14277^2 .

It is not a de Polignac number, because 649127133 - 2¹ = 649127131 is a prime.

It is a super-3 number, since 3×649127133³ (a number of 27 digits) contains 333 as substring.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (649127131) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2121178 + ... + 2121483.

It is an arithmetic number, because the mean of its divisors is an integer number (82731909).

Almost surely, 2^649127133 is an apocalyptic number.

It is an amenable number.

649127133 is a deficient number, since it is larger than the sum of its proper divisors (343655775).

649127133 is a wasteful number, since it uses less digits than its factorization.

649127133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4242684 (or 4242681 counting only the distinct ones).

The product of its digits is 27216, while the sum is 36.

The square root of 649127133 is about 25477.9734869161. The cubic root of 649127133 is about 865.8511821431.

The spelling of 649127133 in words is "six hundred forty-nine million, one hundred twenty-seven thousand, one hundred thirty-three".