643313713 has 4 divisors (see below), whose sum is σ = 735215680. Its totient is φ = 551411748.

The previous prime is 643313707. The next prime is 643313719. The reversal of 643313713 is 317313346.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (643313707) and next prime (643313719).

It is a cyclic number.

It is not a de Polignac number, because 643313713 - 2²⁹ = 106442801 is a prime.

It is a Duffinian 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 (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45950973 + ... + 45950986.

It is an arithmetic number, because the mean of its divisors is an integer number (183803920).

Almost surely, 2^643313713 is an apocalyptic number.

It is an amenable number.

643313713 is a deficient number, since it is larger than the sum of its proper divisors (91901967).

643313713 is an equidigital number, since it uses as much as digits as its factorization.

643313713 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91901966.

The product of its digits is 13608, while the sum is 31.

The square root of 643313713 is about 25363.6297284123. The cubic root of 643313713 is about 863.2586452021.

The spelling of 643313713 in words is "six hundred forty-three million, three hundred thirteen thousand, seven hundred thirteen".