16040449 has 2 divisors, whose sum is σ = 16040450. Its totient is φ = 16040448.

The previous prime is 16040441. The next prime is 16040459. The reversal of 16040449 is 94404061.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15054400 + 986049 = 3880^2 + 993^2 .

It is an emirp because it is prime and its reverse (94404061) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16040449 - 2³ = 16040441 is a prime.

It is not a weakly prime, because it can be changed into another prime (16040441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8020224 + 8020225.

It is an arithmetic number, because the mean of its divisors is an integer number (8020225).

Almost surely, 2^16040449 is an apocalyptic number.

It is an amenable number.

16040449 is a deficient number, since it is larger than the sum of its proper divisors (1).

16040449 is an equidigital number, since it uses as much as digits as its factorization.

16040449 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 16040449 is about 4005.0529334829. The cubic root of 16040449 is about 252.1963752342.

The spelling of 16040449 in words is "sixteen million, forty thousand, four hundred forty-nine".