68181321 has 8 divisors (see below), whose sum is σ = 97901440. Its totient is φ = 41957712.

The previous prime is 68181317. The next prime is 68181331. The reversal of 68181321 is 12318186.

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

It is not a de Polignac number, because 68181321 - 2² = 68181317 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (68181301) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 874081 + ... + 874158.

It is an arithmetic number, because the mean of its divisors is an integer number (12237680).

Almost surely, 2^68181321 is an apocalyptic number.

It is an amenable number.

68181321 is a deficient number, since it is larger than the sum of its proper divisors (29720119).

68181321 is a wasteful number, since it uses less digits than its factorization.

68181321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1748255.

The product of its digits is 2304, while the sum is 30.

The square root of 68181321 is about 8257.1981325387. The cubic root of 68181321 is about 408.5279773215.

The spelling of 68181321 in words is "sixty-eight million, one hundred eighty-one thousand, three hundred twenty-one".