9009409 has 2 divisors, whose sum is σ = 9009410. Its totient is φ = 9009408.

The previous prime is 9009391. The next prime is 9009419. The reversal of 9009409 is 9049009.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9000000 + 9409 = 3000^2 + 97^2 .

It is a cyclic number.

It is not a de Polignac number, because 9009409 - 2⁷ = 9009281 is a prime.

It is not a weakly prime, because it can be changed into another prime (9009419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4504704 + 4504705.

It is an arithmetic number, because the mean of its divisors is an integer number (4504705).

Almost surely, 2^9009409 is an apocalyptic number.

It is an amenable number.

9009409 is a deficient number, since it is larger than the sum of its proper divisors (1).

9009409 is an equidigital number, since it uses as much as digits as its factorization.

9009409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2916, while the sum is 31.

The square root of 9009409 is about 3001.5677570230. The cubic root of 9009409 is about 208.0808441287.

It can be divided in two parts, 900 and 9409, that multiplied together give a square (8468100 = 2910²).

The spelling of 9009409 in words is "nine million, nine thousand, four hundred nine".