68089181 has 4 divisors (see below), whose sum is σ = 68116764. Its totient is φ = 68061600.

The previous prime is 68089159. The next prime is 68089193. The reversal of 68089181 is 18198086.

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 11222500 + 56866681 = 3350^2 + 7541^2 .

It is a cyclic number.

It is not a de Polignac number, because 68089181 - 2⁶ = 68089117 is a prime.

It is a super-2 number, since 2×68089181² = 9272273138501522, 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 (68085181) 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, 9680 + ... + 15161.

It is an arithmetic number, because the mean of its divisors is an integer number (17029191).

Almost surely, 2^68089181 is an apocalyptic number.

It is an amenable number.

68089181 is a deficient number, since it is larger than the sum of its proper divisors (27583).

68089181 is a wasteful number, since it uses less digits than its factorization.

68089181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27582.

The product of its (nonzero) digits is 27648, while the sum is 41.

The square root of 68089181 is about 8251.6168718621. The cubic root of 68089181 is about 408.3438665986.

The spelling of 68089181 in words is "sixty-eight million, eighty-nine thousand, one hundred eighty-one".