16989743 has 8 divisors (see below), whose sum is σ = 17940720. Its totient is φ = 16089048.

The previous prime is 16989727. The next prime is 16989757. The reversal of 16989743 is 34798961.

It is not a de Polignac number, because 16989743 - 2⁴ = 16989727 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16989143) 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 7 ways as a sum of consecutive naturals, for example, 5621 + ... + 8097.

It is an arithmetic number, because the mean of its divisors is an integer number (2242590).

Almost surely, 2^16989743 is an apocalyptic number.

16989743 is a deficient number, since it is larger than the sum of its proper divisors (950977).

16989743 is an frugal number, since it uses more digits than its factorization.

16989743 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2534 (or 2496 counting only the distinct ones).

The product of its digits is 326592, while the sum is 47.

The square root of 16989743 is about 4121.8615939888. The cubic root of 16989743 is about 257.0764356516.

The spelling of 16989743 in words is "sixteen million, nine hundred eighty-nine thousand, seven hundred forty-three".