16949789 has 2 divisors, whose sum is σ = 16949790. Its totient is φ = 16949788.

The previous prime is 16949773. The next prime is 16949791. The reversal of 16949789 is 98794961.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16949689 + 100 = 4117^2 + 10^2 .

It is an emirp because it is prime and its reverse (98794961) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16949789 - 2⁴ = 16949773 is a prime.

Together with 16949791, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 16949789.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16349789) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8474894 + 8474895.

It is an arithmetic number, because the mean of its divisors is an integer number (8474895).

Almost surely, 2^16949789 is an apocalyptic number.

It is an amenable number.

16949789 is a deficient number, since it is larger than the sum of its proper divisors (1).

16949789 is an equidigital number, since it uses as much as digits as its factorization.

16949789 is an odious number, because the sum of its binary digits is odd.

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

The square root of 16949789 is about 4117.0121447477. The cubic root of 16949789 is about 256.8747591870.

The spelling of 16949789 in words is "sixteen million, nine hundred forty-nine thousand, seven hundred eighty-nine".