16716993 has 4 divisors (see below), whose sum is σ = 22289328. Its totient is φ = 11144660.

The previous prime is 16716991. The next prime is 16717013. The reversal of 16716993 is 39961761.

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 16716993 - 2¹ = 16716991 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16716991) 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, 2786163 + ... + 2786168.

It is an arithmetic number, because the mean of its divisors is an integer number (5572332).

Almost surely, 2^16716993 is an apocalyptic number.

It is an amenable number.

16716993 is a deficient number, since it is larger than the sum of its proper divisors (5572335).

16716993 is an equidigital number, since it uses as much as digits as its factorization.

16716993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5572334.

The product of its digits is 61236, while the sum is 42.

The square root of 16716993 is about 4088.6419505748. The cubic root of 16716993 is about 255.6933227423.

The spelling of 16716993 in words is "sixteen million, seven hundred sixteen thousand, nine hundred ninety-three".