16449109 has 2 divisors, whose sum is σ = 16449110. Its totient is φ = 16449108.

The previous prime is 16449073. The next prime is 16449113. The reversal of 16449109 is 90194461.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16443025 + 6084 = 4055^2 + 78^2 .

It is a cyclic number.

It is not a de Polignac number, because 16449109 - 2⁷ = 16448981 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16449709) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8224554 + 8224555.

It is an arithmetic number, because the mean of its divisors is an integer number (8224555).

Almost surely, 2^16449109 is an apocalyptic number.

It is an amenable number.

16449109 is a deficient number, since it is larger than the sum of its proper divisors (1).

16449109 is an equidigital number, since it uses as much as digits as its factorization.

16449109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7776, while the sum is 34.

The square root of 16449109 is about 4055.7501155766. The cubic root of 16449109 is about 254.3201627451.

The spelling of 16449109 in words is "sixteen million, four hundred forty-nine thousand, one hundred nine".