8499409 has 2 divisors, whose sum is σ = 8499410. Its totient is φ = 8499408.

The previous prime is 8499389. The next prime is 8499461. The reversal of 8499409 is 9049948.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5626384 + 2873025 = 2372^2 + 1695^2 .

It is a cyclic number.

It is not a de Polignac number, because 8499409 - 2⁵ = 8499377 is a prime.

8499409 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (8499209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4249704 + 4249705.

It is an arithmetic number, because the mean of its divisors is an integer number (4249705).

Almost surely, 2^8499409 is an apocalyptic number.

It is an amenable number.

8499409 is a deficient number, since it is larger than the sum of its proper divisors (1).

8499409 is an equidigital number, since it uses as much as digits as its factorization.

8499409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 93312, while the sum is 43.

The square root of 8499409 is about 2915.3745899970. The cubic root of 8499409 is about 204.0780250683.

The spelling of 8499409 in words is "eight million, four hundred ninety-nine thousand, four hundred nine".