673831009 has 2 divisors, whose sum is σ = 673831010. Its totient is φ = 673831008.

The previous prime is 673830929. The next prime is 673831043. The reversal of 673831009 is 900138376.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 516880225 + 156950784 = 22735^2 + 12528^2 .

It is a cyclic number.

It is not a de Polignac number, because 673831009 - 2⁷ = 673830881 is a prime.

It is not a weakly prime, because it can be changed into another prime (673831049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 336915504 + 336915505.

It is an arithmetic number, because the mean of its divisors is an integer number (336915505).

Almost surely, 2^673831009 is an apocalyptic number.

It is an amenable number.

673831009 is a deficient number, since it is larger than the sum of its proper divisors (1).

673831009 is an equidigital number, since it uses as much as digits as its factorization.

673831009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27216, while the sum is 37.

The square root of 673831009 is about 25958.2551224076. The cubic root of 673831009 is about 876.6986361974.

The spelling of 673831009 in words is "six hundred seventy-three million, eight hundred thirty-one thousand, nine".