16449449 has 2 divisors, whose sum is σ = 16449450. Its totient is φ = 16449448.

The previous prime is 16449427. The next prime is 16449457. The reversal of 16449449 is 94494461.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13191424 + 3258025 = 3632^2 + 1805^2 .

It is an emirp because it is prime and its reverse (94494461) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16449449 - 2²⁰ = 15400873 is a prime.

It is not a weakly prime, because it can be changed into another prime (16449469) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8224724 + 8224725.

It is an arithmetic number, because the mean of its divisors is an integer number (8224725).

Almost surely, 2^16449449 is an apocalyptic number.

It is an amenable number.

16449449 is a deficient number, since it is larger than the sum of its proper divisors (1).

16449449 is an equidigital number, since it uses as much as digits as its factorization.

16449449 is an evil number, because the sum of its binary digits is even.

The product of its digits is 124416, while the sum is 41.

The square root of 16449449 is about 4055.7920311574. The cubic root of 16449449 is about 254.3219149831.

The spelling of 16449449 in words is "sixteen million, four hundred forty-nine thousand, four hundred forty-nine".