16634 has 4 divisors (see below), whose sum is σ = 24954. Its totient is φ = 8316.

The previous prime is 16633. The next prime is 16649. The reversal of 16634 is 43661.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 9409 + 7225 = 97^2 + 85^2 .

It is a d-powerful number, because it can be written as 1 + 6 + 6³ + 3³ + 4⁷ .

It is a plaindrome in base 15.

It is a nialpdrome in base 7 and base 12.

It is not an unprimeable number, because it can be changed into a prime (16631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4157 + ... + 4160.

2¹⁶⁶³⁴ is an apocalyptic number.

16634 is a deficient number, since it is larger than the sum of its proper divisors (8320).

16634 is an equidigital number, since it uses as much as digits as its factorization.

16634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8319.

The product of its digits is 432, while the sum is 20.

The square root of 16634 is about 128.9728653632. The cubic root of 16634 is about 25.5269483149.

The spelling of 16634 in words is "sixteen thousand, six hundred thirty-four".