68939081 has 8 divisors (see below), whose sum is σ = 71820000. Its totient is φ = 66115360.

The previous prime is 68939077. The next prime is 68939107. The reversal of 68939081 is 18093986.

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 68939081 - 2² = 68939077 is a prime.

It is a super-2 number, since 2×68939081² = 9505193778249122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68939281) 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, 11831 + ... + 16668.

It is an arithmetic number, because the mean of its divisors is an integer number (8977500).

Almost surely, 2^68939081 is an apocalyptic number.

It is an amenable number.

68939081 is a deficient number, since it is larger than the sum of its proper divisors (2880919).

68939081 is a wasteful number, since it uses less digits than its factorization.

68939081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28599.

The product of its (nonzero) digits is 93312, while the sum is 44.

The square root of 68939081 is about 8302.9561603082. The cubic root of 68939081 is about 410.0358505237.

The spelling of 68939081 in words is "sixty-eight million, nine hundred thirty-nine thousand, eighty-one".