16871997 has 16 divisors (see below), whose sum is σ = 23544000. Its totient is φ = 10733184.

The previous prime is 16871993. The next prime is 16871999. The reversal of 16871997 is 79917861.

It is a happy number.

It is not a de Polignac number, because 16871997 - 2² = 16871993 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16871993) 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 15 ways as a sum of consecutive naturals, for example, 6654 + ... + 8832.

It is an arithmetic number, because the mean of its divisors is an integer number (1471500).

Almost surely, 2^16871997 is an apocalyptic number.

It is an amenable number.

16871997 is a deficient number, since it is larger than the sum of its proper divisors (6672003).

16871997 is a wasteful number, since it uses less digits than its factorization.

16871997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2300.

The product of its digits is 190512, while the sum is 48.

The square root of 16871997 is about 4107.5536515060. The cubic root of 16871997 is about 256.4811761129.

The spelling of 16871997 in words is "sixteen million, eight hundred seventy-one thousand, nine hundred ninety-seven".