16678793 has 4 divisors (see below), whose sum is σ = 16720788. Its totient is φ = 16636800.

The previous prime is 16678771. The next prime is 16678801. The reversal of 16678793 is 39787661.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 11235904 + 5442889 = 3352^2 + 2333^2 .

It is a cyclic number.

It is not a de Polignac number, because 16678793 - 2¹⁴ = 16662409 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16678733) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20396 + ... + 21197.

It is an arithmetic number, because the mean of its divisors is an integer number (4180197).

Almost surely, 2^16678793 is an apocalyptic number.

It is an amenable number.

16678793 is a deficient number, since it is larger than the sum of its proper divisors (41995).

16678793 is an equidigital number, since it uses as much as digits as its factorization.

16678793 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41994.

The product of its digits is 381024, while the sum is 47.

The square root of 16678793 is about 4083.9678010484. The cubic root of 16678793 is about 255.4984126034.

It can be divided in two parts, 16678 and 793, that added together give a palindrome (17471).

The spelling of 16678793 in words is "sixteen million, six hundred seventy-eight thousand, seven hundred ninety-three".