16994193 has 4 divisors (see below), whose sum is σ = 22658928. Its totient is φ = 11329460.

The previous prime is 16994191. The next prime is 16994207. The reversal of 16994193 is 39149961.

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, and also an emirpimes, since its reverse is a distinct semiprime: 39149961 = 3 ⋅13049987.

It is a cyclic number.

It is not a de Polignac number, because 16994193 - 2¹ = 16994191 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16994191) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 2832363 + ... + 2832368.

It is an arithmetic number, because the mean of its divisors is an integer number (5664732).

Almost surely, 2^16994193 is an apocalyptic number.

It is an amenable number.

16994193 is a deficient number, since it is larger than the sum of its proper divisors (5664735).

16994193 is an equidigital number, since it uses as much as digits as its factorization.

16994193 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5664734.

The product of its digits is 52488, while the sum is 42.

The square root of 16994193 is about 4122.4013632833. The cubic root of 16994193 is about 257.0988784136.

The spelling of 16994193 in words is "sixteen million, nine hundred ninety-four thousand, one hundred ninety-three".