16949 has 4 divisors (see below), whose sum is σ = 17964.
Its totient is φ = 15936.
The previous prime is 16943. The next prime is 16963. The reversal of 16949 is 94961.
It can be divided in two parts, 169 and 49, that multiplied together give a square (8281 = 912).
It is a semiprime because it is the product of two primes.
It can be written as a sum of positive squares in 2 ways, for example, as 13924 + 3025 = 118^2 + 55^2
It is a cyclic number.
It is not a de Polignac number, because 16949 - 28 = 16693 is a prime.
It is an alternating number because its digits alternate between odd and even.
It is a Duffinian number.
It is a nialpdrome in base 12.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (16943) by changing a digit.
It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 482 + ... + 515.
It is an arithmetic number, because the mean of its divisors is an integer number (4491).
216949 is an apocalyptic number.
It is an amenable number.
16949 is a deficient number, since it is larger than the sum of its proper divisors (1015).
16949 is an equidigital number, since it uses as much as digits as its factorization.
16949 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 1014.
The product of its digits is 1944, while the sum is 29.
The square root of 16949 is about 130.1883251294.
The cubic root of 16949 is about 25.6870773349.
The spelling of 16949 in words is "sixteen thousand, nine hundred forty-nine".