8449409 has 2 divisors, whose sum is σ = 8449410. Its totient is φ = 8449408.

The previous prime is 8449387. The next prime is 8449417. The reversal of 8449409 is 9049448.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5569600 + 2879809 = 2360^2 + 1697^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8449409 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (8449429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4224704 + 4224705.

It is an arithmetic number, because the mean of its divisors is an integer number (4224705).

Almost surely, 2^8449409 is an apocalyptic number.

It is an amenable number.

8449409 is a deficient number, since it is larger than the sum of its proper divisors (1).

8449409 is an equidigital number, since it uses as much as digits as its factorization.

8449409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 41472, while the sum is 38.

The square root of 8449409 is about 2906.7867138818. The cubic root of 8449409 is about 203.6770569560.

The spelling of 8449409 in words is "eight million, four hundred forty-nine thousand, four hundred nine".