643313711 has 6 divisors (see below), whose sum is σ = 683382000. Its totient is φ = 605471456.

The previous prime is 643313707. The next prime is 643313719. The reversal of 643313711 is 117313346.

It is not a de Polignac number, because 643313711 - 2² = 643313707 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (643313719) 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 5 ways as a sum of consecutive naturals, for example, 1112711 + ... + 1113288.

It is an arithmetic number, because the mean of its divisors is an integer number (113897000).

Almost surely, 2^643313711 is an apocalyptic number.

643313711 is a deficient number, since it is larger than the sum of its proper divisors (40068289).

643313711 is a wasteful number, since it uses less digits than its factorization.

643313711 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2226033 (or 2226016 counting only the distinct ones).

The product of its digits is 4536, while the sum is 29.

The square root of 643313711 is about 25363.6296889858. The cubic root of 643313711 is about 863.2586443075.

The spelling of 643313711 in words is "six hundred forty-three million, three hundred thirteen thousand, seven hundred eleven".