16209049 has 2 divisors, whose sum is σ = 16209050. Its totient is φ = 16209048.

The previous prime is 16209047. The next prime is 16209073. The reversal of 16209049 is 94090261.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12027024 + 4182025 = 3468^2 + 2045^2 .

It is a cyclic number.

It is not a de Polignac number, because 16209049 - 2¹ = 16209047 is a prime.

Together with 16209047, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 16209049.

It is not a weakly prime, because it can be changed into another prime (16209047) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8104524 + 8104525.

It is an arithmetic number, because the mean of its divisors is an integer number (8104525).

Almost surely, 2^16209049 is an apocalyptic number.

It is an amenable number.

16209049 is a deficient number, since it is larger than the sum of its proper divisors (1).

16209049 is an equidigital number, since it uses as much as digits as its factorization.

16209049 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3888, while the sum is 31.

The square root of 16209049 is about 4026.0463236282. The cubic root of 16209049 is about 253.0769033039.

The spelling of 16209049 in words is "sixteen million, two hundred nine thousand, forty-nine".