6731009 has 2 divisors, whose sum is σ = 6731010. Its totient is φ = 6731008.

The previous prime is 6730993. The next prime is 6731017. The reversal of 6731009 is 9001376.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3591025 + 3139984 = 1895^2 + 1772^2 .

It is a cyclic number.

It is not a de Polignac number, because 6731009 - 2⁴ = 6730993 is a prime.

It is not a weakly prime, because it can be changed into another prime (6731029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3365504 + 3365505.

It is an arithmetic number, because the mean of its divisors is an integer number (3365505).

Almost surely, 2^6731009 is an apocalyptic number.

It is an amenable number.

6731009 is a deficient number, since it is larger than the sum of its proper divisors (1).

6731009 is an equidigital number, since it uses as much as digits as its factorization.

6731009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1134, while the sum is 26.

The square root of 6731009 is about 2594.4188173847. The cubic root of 6731009 is about 188.8107527780.

The spelling of 6731009 in words is "six million, seven hundred thirty-one thousand, nine".