6409849 has 2 divisors, whose sum is σ = 6409850. Its totient is φ = 6409848.

The previous prime is 6409807. The next prime is 6409883. The reversal of 6409849 is 9489046.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4981824 + 1428025 = 2232^2 + 1195^2 .

It is a cyclic number.

It is not a de Polignac number, because 6409849 - 2⁷ = 6409721 is a prime.

It is not a weakly prime, because it can be changed into another prime (6409889) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3204924 + 3204925.

It is an arithmetic number, because the mean of its divisors is an integer number (3204925).

Almost surely, 2^6409849 is an apocalyptic number.

It is an amenable number.

6409849 is a deficient number, since it is larger than the sum of its proper divisors (1).

6409849 is an equidigital number, since it uses as much as digits as its factorization.

6409849 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 62208, while the sum is 40.

The square root of 6409849 is about 2531.7679593517. The cubic root of 6409849 is about 185.7587441322.

The spelling of 6409849 in words is "six million, four hundred nine thousand, eight hundred forty-nine".