649843349 has 8 divisors (see below), whose sum is σ = 652179552. Its totient is φ = 647512560.

The previous prime is 649843319. The next prime is 649843361. The reversal of 649843349 is 943348946.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-649843349 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 649843297 and 649843306.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (649843319) 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, 505862 + ... + 507144.

It is an arithmetic number, because the mean of its divisors is an integer number (81522444).

Almost surely, 2^649843349 is an apocalyptic number.

It is an amenable number.

649843349 is a deficient number, since it is larger than the sum of its proper divisors (2336203).

649843349 is a wasteful number, since it uses less digits than its factorization.

649843349 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2707.

The product of its digits is 2239488, while the sum is 50.

The square root of 649843349 is about 25492.0252039731. The cubic root of 649843349 is about 866.1695114308.

The spelling of 649843349 in words is "six hundred forty-nine million, eight hundred forty-three thousand, three hundred forty-nine".