16556873 has 4 divisors (see below), whose sum is σ = 16703508. Its totient is φ = 16410240.

The previous prime is 16556867. The next prime is 16556879. The reversal of 16556873 is 37865561.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 37865561 = 29 ⋅1305709.

It is an interprime number because it is at equal distance from previous prime (16556867) and next prime (16556879).

It can be written as a sum of positive squares in 2 ways, for example, as 170569 + 16386304 = 413^2 + 4048^2 .

It is a cyclic number.

It is not a de Polignac number, because 16556873 - 2¹⁰ = 16555849 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 16556873.

It is not an unprimeable number, because it can be changed into a prime (16556879) 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, 73148 + ... + 73373.

It is an arithmetic number, because the mean of its divisors is an integer number (4175877).

Almost surely, 2^16556873 is an apocalyptic number.

It is an amenable number.

16556873 is a deficient number, since it is larger than the sum of its proper divisors (146635).

16556873 is a wasteful number, since it uses less digits than its factorization.

16556873 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146634.

The product of its digits is 151200, while the sum is 41.

The square root of 16556873 is about 4069.0137625720. The cubic root of 16556873 is about 254.8743351089.

The spelling of 16556873 in words is "sixteen million, five hundred fifty-six thousand, eight hundred seventy-three".