649843311 has 32 divisors (see below), whose sum is σ = 979034112. Its totient is φ = 380413440.

The previous prime is 649843307. The next prime is 649843319. The reversal of 649843311 is 113348946.

It is not a de Polignac number, because 649843311 - 2² = 649843307 is a prime.

It is a super-3 number, since 3×649843311³ (a number of 27 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a self number, because there is not a number n which added to its sum of digits gives 649843311.

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 (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 169431 + ... + 173223.

It is an arithmetic number, because the mean of its divisors is an integer number (30594816).

Almost surely, 2^649843311 is an apocalyptic number.

649843311 is a deficient number, since it is larger than the sum of its proper divisors (329190801).

649843311 is a wasteful number, since it uses less digits than its factorization.

649843311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4023.

The product of its digits is 62208, while the sum is 39.

The square root of 649843311 is about 25492.0244586420. The cubic root of 649843311 is about 866.1694945476.

The spelling of 649843311 in words is "six hundred forty-nine million, eight hundred forty-three thousand, three hundred eleven".