671794589 has 2 divisors, whose sum is σ = 671794590. Its totient is φ = 671794588.

The previous prime is 671794537. The next prime is 671794631. The reversal of 671794589 is 985497176.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 671328100 + 466489 = 25910^2 + 683^2 .

It is a cyclic number.

It is not a de Polignac number, because 671794589 - 2²⁸ = 403359133 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (671794789) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 335897294 + 335897295.

It is an arithmetic number, because the mean of its divisors is an integer number (335897295).

Almost surely, 2^671794589 is an apocalyptic number.

It is an amenable number.

671794589 is a deficient number, since it is larger than the sum of its proper divisors (1).

671794589 is an equidigital number, since it uses as much as digits as its factorization.

671794589 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3810240, while the sum is 56.

The square root of 671794589 is about 25919.0005401443. Note that the first 3 decimals coincide. The cubic root of 671794589 is about 875.8145727115.

The spelling of 671794589 in words is "six hundred seventy-one million, seven hundred ninety-four thousand, five hundred eighty-nine".