16989777 has 32 divisors (see below), whose sum is σ = 28962560. Its totient is φ = 9642240.

The previous prime is 16989769. The next prime is 16989779. The reversal of 16989777 is 77798961.

It is not a de Polignac number, because 16989777 - 2³ = 16989769 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16989779) 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 31 ways as a sum of consecutive naturals, for example, 45363 + ... + 45735.

It is an arithmetic number, because the mean of its divisors is an integer number (905080).

Almost surely, 2^16989777 is an apocalyptic number.

It is an amenable number.

16989777 is a deficient number, since it is larger than the sum of its proper divisors (11972783).

16989777 is a wasteful number, since it uses less digits than its factorization.

16989777 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 630 (or 624 counting only the distinct ones).

The product of its digits is 1333584, while the sum is 54.

The square root of 16989777 is about 4121.8657183368. The cubic root of 16989777 is about 257.0766071392.

It can be divided in two parts, 16989 and 777, that added together give a triangular number (17766 = T₁₈₈).

The spelling of 16989777 in words is "sixteen million, nine hundred eighty-nine thousand, seven hundred seventy-seven".