16749329 has 4 divisors (see below), whose sum is σ = 16802484. Its totient is φ = 16696176.

The previous prime is 16749323. The next prime is 16749347. The reversal of 16749329 is 92394761.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 330625 + 16418704 = 575^2 + 4052^2 .

It is a cyclic number.

It is not a de Polignac number, because 16749329 - 2¹² = 16745233 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (16749323) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26102 + ... + 26735.

It is an arithmetic number, because the mean of its divisors is an integer number (4200621).

Almost surely, 2^16749329 is an apocalyptic number.

It is an amenable number.

16749329 is a deficient number, since it is larger than the sum of its proper divisors (53155).

16749329 is an equidigital number, since it uses as much as digits as its factorization.

16749329 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53154.

The product of its digits is 81648, while the sum is 41.

The square root of 16749329 is about 4092.5944094181. The cubic root of 16749329 is about 255.8580807216.

The spelling of 16749329 in words is "sixteen million, seven hundred forty-nine thousand, three hundred twenty-nine".