16689345 has 8 divisors (see below), whose sum is σ = 26702976. Its totient is φ = 8900976.

The previous prime is 16689311. The next prime is 16689349. The reversal of 16689345 is 54398661.

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

It is not a de Polignac number, because 16689345 - 2⁷ = 16689217 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 16689297 and 16689306.

It is not an unprimeable number, because it can be changed into a prime (16689349) 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, 556297 + ... + 556326.

It is an arithmetic number, because the mean of its divisors is an integer number (3337872).

Almost surely, 2^16689345 is an apocalyptic number.

16689345 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

16689345 is a deficient number, since it is larger than the sum of its proper divisors (10013631).

16689345 is a wasteful number, since it uses less digits than its factorization.

16689345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1112631.

The product of its digits is 155520, while the sum is 42.

The square root of 16689345 is about 4085.2594776831. The cubic root of 16689345 is about 255.5522824267.

The spelling of 16689345 in words is "sixteen million, six hundred eighty-nine thousand, three hundred forty-five".