633 has 4 divisors (see below), whose sum is σ = 848.
Its totient is φ = 420.
The previous prime is 631. The next prime is 641. The reversal of 633 is 336.
633 is nontrivially palindromic in base 2 and base 14.
It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.
It is not a de Polignac number, because 633 - 21 = 631 is a prime.
It is a D-number.
It is a Duffinian number.
633 is a modest number, since divided by 33 gives 6 as remainder.
633 is a nontrivial repdigit in base 14.
It is a plaindrome in base 12, base 13, base 14 and base 16.
It is a nialpdrome in base 9, base 10 and base 14.
It is a zygodrome in base 14.
It is not an unprimeable number, because it can be changed into a prime (631) 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, 103 + ... + 108.
It is an arithmetic number, because the mean of its divisors is an integer number (212).
It is an amenable number.
633 is a deficient number, since it is larger than the sum of its proper divisors (215).
633 is a wasteful number, since it uses less digits than its factorization.
633 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 214.
The product of its digits is 54, while the sum is 12.
The square root of 633 is about 25.1594912508.
The cubic root of 633 is about 8.5862046719.
Adding to 633 its reverse (336), we get a palindrome (969).
It can be divided in two parts, 63 and 3, that added together give a palindrome (66).
The spelling of 633 in words is "six hundred thirty-three", and thus it is an aban number and an oban number.