68061321 has 6 divisors (see below), whose sum is σ = 98310810. Its totient is φ = 45374208.

The previous prime is 68061317. The next prime is 68061359. The reversal of 68061321 is 12316086.

It can be written as a sum of positive squares in only one way, i.e., 40182921 + 27878400 = 6339^2 + 5280^2 .

It is not a de Polignac number, because 68061321 - 2² = 68061317 is a prime.

It is not an unprimeable number, because it can be changed into a prime (68061361) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3781176 + ... + 3781193.

It is an arithmetic number, because the mean of its divisors is an integer number (16385135).

Almost surely, 2^68061321 is an apocalyptic number.

It is an amenable number.

68061321 is a deficient number, since it is larger than the sum of its proper divisors (30249489).

68061321 is a wasteful number, since it uses less digits than its factorization.

68061321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7562375 (or 7562372 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 68061321 is about 8249.9285451451. The cubic root of 68061321 is about 408.2881650811.

It can be divided in two parts, 680 and 61321, that added together give a square (62001 = 249²).

The spelling of 68061321 in words is "sixty-eight million, sixty-one thousand, three hundred twenty-one".