68003321 has 4 divisors (see below), whose sum is σ = 68175012. Its totient is φ = 67831632.

The previous prime is 68003291. The next prime is 68003323. The reversal of 68003321 is 12330086.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 16321600 + 51681721 = 4040^2 + 7189^2 .

It is a cyclic number.

It is not a de Polignac number, because 68003321 - 2²² = 63809017 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68003323) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 85250 + ... + 86043.

It is an arithmetic number, because the mean of its divisors is an integer number (17043753).

Almost surely, 2^68003321 is an apocalyptic number.

It is an amenable number.

68003321 is a deficient number, since it is larger than the sum of its proper divisors (171691).

68003321 is a wasteful number, since it uses less digits than its factorization.

68003321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171690.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 68003321 is about 8246.4126139795. The cubic root of 68003321 is about 408.1721547780.

The spelling of 68003321 in words is "sixty-eight million, three thousand, three hundred twenty-one".