641589089 has 2 divisors, whose sum is σ = 641589090. Its totient is φ = 641589088.

The previous prime is 641589077. The next prime is 641589101. The reversal of 641589089 is 980985146.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (641589077) and next prime (641589101).

It can be written as a sum of positive squares in only one way, i.e., 638320225 + 3268864 = 25265^2 + 1808^2 .

It is a cyclic number.

It is not a de Polignac number, because 641589089 - 2⁴ = 641589073 is a prime.

It is not a weakly prime, because it can be changed into another prime (641589589) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 320794544 + 320794545.

It is an arithmetic number, because the mean of its divisors is an integer number (320794545).

Almost surely, 2^641589089 is an apocalyptic number.

It is an amenable number.

641589089 is a deficient number, since it is larger than the sum of its proper divisors (1).

641589089 is an equidigital number, since it uses as much as digits as its factorization.

641589089 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 622080, while the sum is 50.

The square root of 641589089 is about 25329.6089389473. The cubic root of 641589089 is about 862.4865341033.

The spelling of 641589089 in words is "six hundred forty-one million, five hundred eighty-nine thousand, eighty-nine".