16899 has 8 divisors (see below), whose sum is σ = 23232. Its totient is φ = 10920.

The previous prime is 16889. The next prime is 16901. The reversal of 16899 is 99861.

It is a happy number.

It is a Cunningham number, because it is equal to 130²-1.

16899 is an esthetic number in base 6, because in such base its adjacent digits differ by 1.

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

It is not a de Polignac number, because 16899 - 2⁴ = 16883 is a prime.

It is a plaindrome in base 10 and base 13.

It is a nialpdrome in base 12.

It is not an unprimeable number, because it can be changed into a prime (16829) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 64 + ... + 194.

It is an arithmetic number, because the mean of its divisors is an integer number (2904).

2¹⁶⁸⁹⁹ is an apocalyptic number.

16899 is a deficient number, since it is larger than the sum of its proper divisors (6333).

16899 is a wasteful number, since it uses less digits than its factorization.

16899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 177.

The product of its digits is 3888, while the sum is 33.

The square root of 16899 is about 129.9961537893. The cubic root of 16899 is about 25.6617932690.

The spelling of 16899 in words is "sixteen thousand, eight hundred ninety-nine".