68508321 has 12 divisors (see below), whose sum is σ = 106258032. Its totient is φ = 39147528.

The previous prime is 68508313. The next prime is 68508343. The reversal of 68508321 is 12380586.

It is a happy number.

It is not a de Polignac number, because 68508321 - 2³ = 68508313 is a prime.

It is a hoax number, since the sum of its digits (33) coincides with the sum of the digits of its distinct prime factors.

It is a plaindrome in base 13.

It is not an unprimeable number, because it can be changed into a prime (68508221) 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 11 ways as a sum of consecutive naturals, for example, 232875 + ... + 233168.

It is an arithmetic number, because the mean of its divisors is an integer number (8854836).

Almost surely, 2^68508321 is an apocalyptic number.

It is an amenable number.

68508321 is a deficient number, since it is larger than the sum of its proper divisors (37749711).

68508321 is a wasteful number, since it uses less digits than its factorization.

68508321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 466060 (or 466053 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 33.

The square root of 68508321 is about 8276.9753533522. The cubic root of 68508321 is about 409.1800408122.

The spelling of 68508321 in words is "sixty-eight million, five hundred eight thousand, three hundred twenty-one".