16749289 has 4 divisors (see below), whose sum is σ = 16822660. Its totient is φ = 16675920.

The previous prime is 16749287. The next prime is 16749311. The reversal of 16749289 is 98294761.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 98294761 = 293 ⋅335477.

It can be written as a sum of positive squares in 2 ways, for example, as 14953689 + 1795600 = 3867^2 + 1340^2 .

It is a cyclic number.

It is not a de Polignac number, because 16749289 - 2¹ = 16749287 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16749287) 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, 36342 + ... + 36799.

It is an arithmetic number, because the mean of its divisors is an integer number (4205665).

Almost surely, 2^16749289 is an apocalyptic number.

It is an amenable number.

16749289 is a deficient number, since it is larger than the sum of its proper divisors (73371).

16749289 is an equidigital number, since it uses as much as digits as its factorization.

16749289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73370.

The product of its digits is 217728, while the sum is 46.

The square root of 16749289 is about 4092.5895225395. The cubic root of 16749289 is about 255.8578770451.

The spelling of 16749289 in words is "sixteen million, seven hundred forty-nine thousand, two hundred eighty-nine".