68208581 has 8 divisors (see below), whose sum is σ = 78027840. Its totient is φ = 58408128.

The previous prime is 68208577. The next prime is 68208589. The reversal of 68208581 is 18580286.

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

It is a cyclic number.

It is not a de Polignac number, because 68208581 - 2² = 68208577 is a prime.

It is a super-2 number, since 2×68208581² = 9304821044067122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68208589) 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, 4205 + ... + 12413.

It is an arithmetic number, because the mean of its divisors is an integer number (9753480).

Almost surely, 2^68208581 is an apocalyptic number.

It is an amenable number.

68208581 is a deficient number, since it is larger than the sum of its proper divisors (9819259).

68208581 is a wasteful number, since it uses less digits than its factorization.

68208581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9403.

The product of its (nonzero) digits is 30720, while the sum is 38.

The square root of 68208581 is about 8258.8486485708. The cubic root of 68208581 is about 408.5824154415.

The spelling of 68208581 in words is "sixty-eight million, two hundred eight thousand, five hundred eighty-one".