68181943 has 2 divisors, whose sum is σ = 68181944. Its totient is φ = 68181942.

The previous prime is 68181931. The next prime is 68182001. The reversal of 68181943 is 34918186.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68181943 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 68181896 and 68181905.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68181923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34090971 + 34090972.

It is an arithmetic number, because the mean of its divisors is an integer number (34090972).

Almost surely, 2^68181943 is an apocalyptic number.

68181943 is a deficient number, since it is larger than the sum of its proper divisors (1).

68181943 is an equidigital number, since it uses as much as digits as its factorization.

68181943 is an evil number, because the sum of its binary digits is even.

The product of its digits is 41472, while the sum is 40.

The square root of 68181943 is about 8257.2357965605. The cubic root of 68181943 is about 408.5292196149.

The spelling of 68181943 in words is "sixty-eight million, one hundred eighty-one thousand, nine hundred forty-three".