16683993 has 12 divisors (see below), whose sum is σ = 25147200. Its totient is φ = 10638936.

The previous prime is 16683991. The next prime is 16684001. The reversal of 16683993 is 39938661.

It is not a de Polignac number, because 16683993 - 2¹ = 16683991 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (16683991) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 40093 + ... + 40506.

It is an arithmetic number, because the mean of its divisors is an integer number (2095600).

Almost surely, 2^16683993 is an apocalyptic number.

It is an amenable number.

16683993 is a deficient number, since it is larger than the sum of its proper divisors (8463207).

16683993 is a wasteful number, since it uses less digits than its factorization.

16683993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80628 (or 80625 counting only the distinct ones).

The product of its digits is 209952, while the sum is 45.

The square root of 16683993 is about 4084.6043872081. The cubic root of 16683993 is about 255.5249623603.

The spelling of 16683993 in words is "sixteen million, six hundred eighty-three thousand, nine hundred ninety-three".