649533907 has 8 divisors (see below), whose sum is σ = 708956352. Its totient is φ = 590173800.

The previous prime is 649533901. The next prime is 649533919. The reversal of 649533907 is 709335946.

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 649533907 - 2²³ = 641145299 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (649533901) 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, 7732 + ... + 36862.

It is an arithmetic number, because the mean of its divisors is an integer number (88619544).

Almost surely, 2^649533907 is an apocalyptic number.

649533907 is a deficient number, since it is larger than the sum of its proper divisors (59422445).

649533907 is a wasteful number, since it uses less digits than its factorization.

649533907 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31169.

The product of its (nonzero) digits is 612360, while the sum is 46.

The square root of 649533907 is about 25485.9550929527. The cubic root of 649533907 is about 866.0320055837.

It can be divided in two parts, 649 and 533907, that multiplied together give a palindrome (346505643).

The spelling of 649533907 in words is "six hundred forty-nine million, five hundred thirty-three thousand, nine hundred seven".