9400009 has 2 divisors, whose sum is σ = 9400010. Its totient is φ = 9400008.

The previous prime is 9399989. The next prime is 9400019. The reversal of 9400009 is 9000049.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6775609 + 2624400 = 2603^2 + 1620^2 .

It is an emirp because it is prime and its reverse (9000049) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9400009 - 2⁵ = 9399977 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (9400019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4700004 + 4700005.

It is an arithmetic number, because the mean of its divisors is an integer number (4700005).

Almost surely, 2^9400009 is an apocalyptic number.

It is an amenable number.

9400009 is a deficient number, since it is larger than the sum of its proper divisors (1).

9400009 is an equidigital number, since it uses as much as digits as its factorization.

9400009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 324, while the sum is 22.

The square root of 9400009 is about 3065.9434110890. The cubic root of 9400009 is about 211.0454968039.

The spelling of 9400009 in words is "nine million, four hundred thousand, nine".