641827 has 2 divisors, whose sum is σ = 641828. Its totient is φ = 641826.

The previous prime is 641821. The next prime is 641833. The reversal of 641827 is 728146.

641827 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a balanced prime because it is at equal distance from previous prime (641821) and next prime (641833).

It is a cyclic number.

It is not a de Polignac number, because 641827 - 2³ = 641819 is a prime.

It is a Chen prime.

641827 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 641795 and 641804.

It is not a weakly prime, because it can be changed into another prime (641821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 320913 + 320914.

It is an arithmetic number, because the mean of its divisors is an integer number (320914).

2⁶⁴¹⁸²⁷ is an apocalyptic number.

641827 is a deficient number, since it is larger than the sum of its proper divisors (1).

641827 is an equidigital number, since it uses as much as digits as its factorization.

641827 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2688, while the sum is 28.

The square root of 641827 is about 801.1410612370. The cubic root of 641827 is about 86.2593128640.

It can be divided in two parts, 64 and 1827, that added together give a triangular number (1891 = T₆₁).

The spelling of 641827 in words is "six hundred forty-one thousand, eight hundred twenty-seven".