641089 has 2 divisors, whose sum is σ = 641090. Its totient is φ = 641088.

The previous prime is 641083. The next prime is 641093. The reversal of 641089 is 980146.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 640000 + 1089 = 800^2 + 33^2 .

It is a cyclic number.

It is not a de Polignac number, because 641089 - 2⁵ = 641057 is a prime.

It is not a weakly prime, because it can be changed into another prime (641083) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 320544 + 320545.

It is an arithmetic number, because the mean of its divisors is an integer number (320545).

2⁶⁴¹⁰⁸⁹ is an apocalyptic number.

It is an amenable number.

641089 is a deficient number, since it is larger than the sum of its proper divisors (1).

641089 is an equidigital number, since it uses as much as digits as its factorization.

641089 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 641089 is about 800.6803357146. The cubic root of 641089 is about 86.2262386411.

It can be divided in two parts, 64 and 1089, that multiplied together give a palindrome (69696).

The spelling of 641089 in words is "six hundred forty-one thousand, eighty-nine".