649933497 has 16 divisors (see below), whose sum is σ = 963258880. Its totient is φ = 433111536.

The previous prime is 649933421. The next prime is 649933523. The reversal of 649933497 is 794339946.

649933497 is a `hidden beast` number, since 64 + 9 + 93 + 3 + 497 = 666.

It is not a de Polignac number, because 649933497 - 2¹⁰ = 649932473 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (649933597) 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 15 ways as a sum of consecutive naturals, for example, 117363 + ... + 122775.

It is an arithmetic number, because the mean of its divisors is an integer number (60203680).

Almost surely, 2^649933497 is an apocalyptic number.

It is an amenable number.

649933497 is a deficient number, since it is larger than the sum of its proper divisors (313325383).

649933497 is a wasteful number, since it uses less digits than its factorization.

649933497 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9869 (or 9863 counting only the distinct ones).

The product of its digits is 4408992, while the sum is 54.

The square root of 649933497 is about 25493.7933034690. The cubic root of 649933497 is about 866.2095620260.

The spelling of 649933497 in words is "six hundred forty-nine million, nine hundred thirty-three thousand, four hundred ninety-seven".