641593843 has 16 divisors (see below), whose sum is σ = 747152640. Its totient is φ = 544773600.

The previous prime is 641593831. The next prime is 641593867. The reversal of 641593843 is 348395146.

It is a cyclic number.

It is not a de Polignac number, because 641593843 - 2⁵ = 641593811 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 641593843.

It is not an unprimeable number, because it can be changed into a prime (641591843) 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 15 ways as a sum of consecutive naturals, for example, 6780 + ... + 36457.

It is an arithmetic number, because the mean of its divisors is an integer number (46697040).

Almost surely, 2^641593843 is an apocalyptic number.

641593843 is a deficient number, since it is larger than the sum of its proper divisors (105558797).

641593843 is a wasteful number, since it uses less digits than its factorization.

641593843 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43338.

The product of its digits is 311040, while the sum is 43.

The square root of 641593843 is about 25329.7027815172. The cubic root of 641593843 is about 862.4886643613.

The spelling of 641593843 in words is "six hundred forty-one million, five hundred ninety-three thousand, eight hundred forty-three".