16997849 has 4 divisors (see below), whose sum is σ = 18543120. Its totient is φ = 15452580.

The previous prime is 16997801. The next prime is 16997861. The reversal of 16997849 is 94879961.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 94879961 = 11 ⋅8625451.

It is not a de Polignac number, because 16997849 - 2²⁰ = 15949273 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 16997849.

It is not an unprimeable number, because it can be changed into a prime (16997549) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 772619 + ... + 772640.

It is an arithmetic number, because the mean of its divisors is an integer number (4635780).

Almost surely, 2^16997849 is an apocalyptic number.

It is an amenable number.

16997849 is a deficient number, since it is larger than the sum of its proper divisors (1545271).

16997849 is a wasteful number, since it uses less digits than its factorization.

16997849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1545270.

The product of its digits is 979776, while the sum is 53.

The square root of 16997849 is about 4122.8447703012. The cubic root of 16997849 is about 257.1173138502.

The spelling of 16997849 in words is "sixteen million, nine hundred ninety-seven thousand, eight hundred forty-nine".