16689547 has 18 divisors (see below), whose sum is σ = 20091588. Its totient is φ = 13815648.

The previous prime is 16689523. The next prime is 16689593. The reversal of 16689547 is 74598661.

It is a de Polignac number, because none of the positive numbers 2^k-16689547 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 16689497 and 16689506.

It is not an unprimeable number, because it can be changed into a prime (16689247) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 187479 + ... + 187567.

Almost surely, 2^16689547 is an apocalyptic number.

16689547 is a deficient number, since it is larger than the sum of its proper divisors (3402041).

16689547 is an frugal number, since it uses more digits than its factorization.

16689547 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 235 (or 139 counting only the distinct ones).

The product of its digits is 362880, while the sum is 46.

The square root of 16689547 is about 4085.2842006401. The cubic root of 16689547 is about 255.5533134509.

The spelling of 16689547 in words is "sixteen million, six hundred eighty-nine thousand, five hundred forty-seven".