16994789 has 8 divisors (see below), whose sum is σ = 20049408. Its totient is φ = 14096880.

The previous prime is 16994771. The next prime is 16994801. The reversal of 16994789 is 98749961.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 16994789 - 2²⁰ = 15946213 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 16994789.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16994689) 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 7 ways as a sum of consecutive naturals, for example, 38942 + ... + 39375.

It is an arithmetic number, because the mean of its divisors is an integer number (2506176).

Almost surely, 2^16994789 is an apocalyptic number.

It is an amenable number.

16994789 is a deficient number, since it is larger than the sum of its proper divisors (3054619).

16994789 is an equidigital number, since it uses as much as digits as its factorization.

16994789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78355.

The product of its digits is 979776, while the sum is 53.

The square root of 16994789 is about 4122.4736506132. The cubic root of 16994789 is about 257.1018839332.

The spelling of 16994789 in words is "sixteen million, nine hundred ninety-four thousand, seven hundred eighty-nine".