7000009 has 2 divisors, whose sum is σ = 7000010. Its totient is φ = 7000008.

The previous prime is 7000003. The next prime is 7000033. The reversal of 7000009 is 9000007.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5745609 + 1254400 = 2397^2 + 1120^2 .

It is a cyclic number.

It is not a de Polignac number, because 7000009 - 2²¹ = 4902857 is a prime.

7000009 is a modest number, since divided by 9 gives 7 as remainder.

It is a junction number, because it is equal to n+sod(n) for n = 6999956 and 7000001.

It is not a weakly prime, because it can be changed into another prime (7000003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3500004 + 3500005.

It is an arithmetic number, because the mean of its divisors is an integer number (3500005).

Almost surely, 2^7000009 is an apocalyptic number.

It is an amenable number.

7000009 is a deficient number, since it is larger than the sum of its proper divisors (1).

7000009 is an equidigital number, since it uses as much as digits as its factorization.

7000009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 63, while the sum is 16.

The square root of 7000009 is about 2645.7530119042. The cubic root of 7000009 is about 191.2932002600.

The spelling of 7000009 in words is "seven million, nine", and thus it is an aban number and an uban number.