16679993 has 4 divisors (see below), whose sum is σ = 18196368. Its totient is φ = 15163620.

The previous prime is 16679987. The next prime is 16680019. The reversal of 16679993 is 39997661.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 16679993 - 2⁴ = 16679977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16679903) 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, 758171 + ... + 758192.

It is an arithmetic number, because the mean of its divisors is an integer number (4549092).

Almost surely, 2^16679993 is an apocalyptic number.

It is an amenable number.

16679993 is a deficient number, since it is larger than the sum of its proper divisors (1516375).

16679993 is a wasteful number, since it uses less digits than its factorization.

16679993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1516374.

The product of its digits is 551124, while the sum is 50.

The square root of 16679993 is about 4084.1147143537. The cubic root of 16679993 is about 255.5045399602.

The spelling of 16679993 in words is "sixteen million, six hundred seventy-nine thousand, nine hundred ninety-three".