16997684 has 24 divisors (see below), whose sum is σ = 32913216. Its totient is φ = 7616000.

The previous prime is 16997677. The next prime is 16997693. The reversal of 16997684 is 48679961.

It is a super-2 number, since 2×16997684² = 577842522727712, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 404 + ... + 5844.

It is an arithmetic number, because the mean of its divisors is an integer number (1371384).

Almost surely, 2^16997684 is an apocalyptic number.

It is an amenable number.

16997684 is a deficient number, since it is larger than the sum of its proper divisors (15915532).

16997684 is a wasteful number, since it uses less digits than its factorization.

16997684 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5527 (or 5525 counting only the distinct ones).

The product of its digits is 653184, while the sum is 50.

The square root of 16997684 is about 4122.8247597976. The cubic root of 16997684 is about 257.1164818921.

The spelling of 16997684 in words is "sixteen million, nine hundred ninety-seven thousand, six hundred eighty-four".