641330089 has 4 divisors (see below), whose sum is σ = 641532420. Its totient is φ = 641127760.

The previous prime is 641330071. The next prime is 641330111. The reversal of 641330089 is 980033146.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 448592400 + 192737689 = 21180^2 + 13883^2 .

It is a cyclic number.

It is not a de Polignac number, because 641330089 - 2⁵ = 641330057 is a prime.

It is a super-2 number, since 2×641330089² = 822608566113495842, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (641330189) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 96334 + ... + 102775.

It is an arithmetic number, because the mean of its divisors is an integer number (160383105).

Almost surely, 2^641330089 is an apocalyptic number.

It is an amenable number.

641330089 is a deficient number, since it is larger than the sum of its proper divisors (202331).

641330089 is a wasteful number, since it uses less digits than its factorization.

641330089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 202330.

The product of its (nonzero) digits is 15552, while the sum is 34.

The square root of 641330089 is about 25324.4958291374. The cubic root of 641330089 is about 862.3704608087.

The spelling of 641330089 in words is "six hundred forty-one million, three hundred thirty thousand, eighty-nine".