673587989 has 2 divisors, whose sum is σ = 673587990. Its totient is φ = 673587988.

The previous prime is 673587961. The next prime is 673588001. The reversal of 673587989 is 989785376.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 672987364 + 600625 = 25942^2 + 775^2 .

It is a cyclic number.

It is not a de Polignac number, because 673587989 - 2²⁴ = 656810773 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 (673587289) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 336793994 + 336793995.

It is an arithmetic number, because the mean of its divisors is an integer number (336793995).

Almost surely, 2^673587989 is an apocalyptic number.

It is an amenable number.

673587989 is a deficient number, since it is larger than the sum of its proper divisors (1).

673587989 is an equidigital number, since it uses as much as digits as its factorization.

673587989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 22861440, while the sum is 62.

The square root of 673587989 is about 25953.5737230925. The cubic root of 673587989 is about 876.5932285022.

The spelling of 673587989 in words is "six hundred seventy-three million, five hundred eighty-seven thousand, nine hundred eighty-nine".