633672321 has 8 divisors (see below), whose sum is σ = 845070144. Its totient is φ = 422361360.

The previous prime is 633672313. The next prime is 633672337. The reversal of 633672321 is 123276336.

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

It is not a de Polignac number, because 633672321 - 2³ = 633672313 is a prime.

It is a super-3 number, since 3×633672321³ (a number of 27 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (633672311) 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, 2181 + ... + 35666.

It is an arithmetic number, because the mean of its divisors is an integer number (105633768).

Almost surely, 2^633672321 is an apocalyptic number.

It is an amenable number.

633672321 is a deficient number, since it is larger than the sum of its proper divisors (211397823).

633672321 is a wasteful number, since it uses less digits than its factorization.

633672321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43431.

The product of its digits is 27216, while the sum is 33.

The square root of 633672321 is about 25172.8488852573. The cubic root of 633672321 is about 858.9243451860.

The spelling of 633672321 in words is "six hundred thirty-three million, six hundred seventy-two thousand, three hundred twenty-one".