643303346 has 16 divisors (see below), whose sum is σ = 1140834240. Its totient is φ = 266194320.

The previous prime is 643303343. The next prime is 643303361.

643303346 is nontrivially palindromic in base 10.

It is not an unprimeable number, because it can be changed into a prime (643303343) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 791840 + ... + 792651.

It is an arithmetic number, because the mean of its divisors is an integer number (71302140).

Almost surely, 2^643303346 is an apocalyptic number.

643303346 is a deficient number, since it is larger than the sum of its proper divisors (497530894).

643303346 is a wasteful number, since it uses less digits than its factorization.

643303346 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1584529.

The product of its (nonzero) digits is 46656, while the sum is 32.

The square root of 643303346 is about 25363.4253601520. The cubic root of 643303346 is about 863.2540080397.

It can be divided in two parts, 64330 and 3346, that added together give a palindrome (67676).

The spelling of 643303346 in words is "six hundred forty-three million, three hundred three thousand, three hundred forty-six".