649772433 has 6 divisors (see below), whose sum is σ = 938560194. Its totient is φ = 433181616.

The previous prime is 649772423. The next prime is 649772437. The reversal of 649772433 is 334277946.

649772433 is a `hidden beast` number, since 64 + 97 + 72 + 433 = 666.

It can be written as a sum of positive squares in only one way, i.e., 648873729 + 898704 = 25473^2 + 948^2 .

It is not a de Polignac number, because 649772433 - 2¹² = 649768337 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (649772437) 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 5 ways as a sum of consecutive naturals, for example, 36098460 + ... + 36098477.

It is an arithmetic number, because the mean of its divisors is an integer number (156426699).

Almost surely, 2^649772433 is an apocalyptic number.

It is an amenable number.

649772433 is a deficient number, since it is larger than the sum of its proper divisors (288787761).

649772433 is a wasteful number, since it uses less digits than its factorization.

649772433 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72196943 (or 72196940 counting only the distinct ones).

The product of its digits is 762048, while the sum is 45.

The square root of 649772433 is about 25490.6342212194. The cubic root of 649772433 is about 866.1380025491.

The spelling of 649772433 in words is "six hundred forty-nine million, seven hundred seventy-two thousand, four hundred thirty-three".