9631 has 2 divisors, whose sum is σ = 9632.
Its totient is φ = 9630.
The previous prime is 9629. The next prime is 9643. The reversal of 9631 is 1369.
It is a weak prime.
It is a cyclic number.
It is not a de Polignac number, because 9631 - 21 = 9629 is a prime.
It is a super-2 number, since 2×96312 = 185512322, which contains 22 as substring.
Together with 9629, it forms a pair of twin primes.
9631 is a lucky number.
It is a plaindrome in base 16.
It is a nialpdrome in base 10.
It is a junction number, because it is equal to n+sod(n) for n = 9599 and 9608.
It is a congruent number.
It is not a weakly prime, because it can be changed into another prime (9601) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4815 + 4816.
It is an arithmetic number, because the mean of its divisors is an integer number (4816).
9631 is a deficient number, since it is larger than the sum of its proper divisors (1).
9631 is an equidigital number, since it uses as much as digits as its factorization.
9631 is an odious number, because the sum of its binary digits is odd.
The product of its digits is 162, while the sum is 19.
The square root of 9631 is about 98.1376584192.
The cubic root of 9631 is about 21.2760234811.
The spelling of 9631 in words is "nine thousand, six hundred thirty-one".