641711 has 4 divisors (see below), whose sum is σ = 733392. Its totient is φ = 550032.

The previous prime is 641701. The next prime is 641713. The reversal of 641711 is 117146.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 117146 = 2 ⋅58573.

It is not a de Polignac number, because 641711 - 2¹⁰ = 640687 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 641711.

It is not an unprimeable number, because it can be changed into a prime (641713) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45830 + ... + 45843.

It is an arithmetic number, because the mean of its divisors is an integer number (183348).

2⁶⁴¹⁷¹¹ is an apocalyptic number.

641711 is a deficient number, since it is larger than the sum of its proper divisors (91681).

641711 is an equidigital number, since it uses as much as digits as its factorization.

641711 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91680.

The product of its digits is 168, while the sum is 20.

The square root of 641711 is about 801.0686612270. The cubic root of 641711 is about 86.2541158856.

Adding to 641711 its reverse (117146), we get a palindrome (758857).

The spelling of 641711 in words is "six hundred forty-one thousand, seven hundred eleven".