68844181 has 4 divisors (see below), whose sum is σ = 78679072. Its totient is φ = 59009292.

The previous prime is 68844179. The next prime is 68844187. The reversal of 68844181 is 18144886.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 68844181 - 2¹ = 68844179 is a prime.

It is a super-2 number, since 2×68844181² = 9479042515121522, 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 (68844187) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4917435 + ... + 4917448.

It is an arithmetic number, because the mean of its divisors is an integer number (19669768).

Almost surely, 2^68844181 is an apocalyptic number.

It is an amenable number.

68844181 is a deficient number, since it is larger than the sum of its proper divisors (9834891).

68844181 is an equidigital number, since it uses as much as digits as its factorization.

68844181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9834890.

The product of its digits is 49152, while the sum is 40.

The square root of 68844181 is about 8297.2393601728. The cubic root of 68844181 is about 409.8476153909.

The spelling of 68844181 in words is "sixty-eight million, eight hundred forty-four thousand, one hundred eighty-one".