632991 has 8 divisors (see below), whose sum is σ = 848304. Its totient is φ = 419840.

The previous prime is 632987. The next prime is 632993. The reversal of 632991 is 199236.

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

It is a cyclic number.

It is not a de Polignac number, because 632991 - 2² = 632987 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (632993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 361 + ... + 1181.

It is an arithmetic number, because the mean of its divisors is an integer number (106038).

2⁶³²⁹⁹¹ is an apocalyptic number.

632991 is a deficient number, since it is larger than the sum of its proper divisors (215313).

632991 is a wasteful number, since it uses less digits than its factorization.

632991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1081.

The product of its digits is 2916, while the sum is 30.

The square root of 632991 is about 795.6073152002. The cubic root of 632991 is about 85.8616397879.

The spelling of 632991 in words is "six hundred thirty-two thousand, nine hundred ninety-one".