16749049 has 8 divisors (see below), whose sum is σ = 17363720. Its totient is φ = 16142976.

The previous prime is 16749017. The next prime is 16749053. The reversal of 16749049 is 94094761.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 2347024 + 14402025 = 1532^2 + 3795^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 16749049 - 2⁵ = 16749017 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16749349) 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 in 7 ways as a sum of consecutive naturals, for example, 1957 + ... + 6109.

It is an arithmetic number, because the mean of its divisors is an integer number (2170465).

Almost surely, 2^16749049 is an apocalyptic number.

It is an amenable number.

16749049 is a deficient number, since it is larger than the sum of its proper divisors (614671).

16749049 is a wasteful number, since it uses less digits than its factorization.

16749049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4299.

The product of its (nonzero) digits is 54432, while the sum is 40.

The square root of 16749049 is about 4092.5602011455. The cubic root of 16749049 is about 255.8566549796.

The spelling of 16749049 in words is "sixteen million, seven hundred forty-nine thousand, forty-nine".