16856973 has 24 divisors (see below), whose sum is σ = 28424448. Its totient is φ = 9425952.

The previous prime is 16856921. The next prime is 16856977. The reversal of 16856973 is 37965861.

It is a happy number.

16856973 is a `hidden beast` number, since 16 + 8 + 569 + 73 = 666.

It is not a de Polignac number, because 16856973 - 2⁸ = 16856717 is a prime.

It is a super-6 number, since 6×16856973⁶ (a number of 45 digits) contains 666666 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16856977) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 115 + ... + 5807.

It is an arithmetic number, because the mean of its divisors is an integer number (1184352).

Almost surely, 2^16856973 is an apocalyptic number.

It is an amenable number.

16856973 is a deficient number, since it is larger than the sum of its proper divisors (11567475).

16856973 is a wasteful number, since it uses less digits than its factorization.

16856973 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5753 (or 5750 counting only the distinct ones).

The product of its digits is 272160, while the sum is 45.

The square root of 16856973 is about 4105.7244184188. The cubic root of 16856973 is about 256.4050239434.

The spelling of 16856973 in words is "sixteen million, eight hundred fifty-six thousand, nine hundred seventy-three".