68581943 has 2 divisors, whose sum is σ = 68581944. Its totient is φ = 68581942.

The previous prime is 68581907. The next prime is 68581993. The reversal of 68581943 is 34918586.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 68581943 - 2⁶ = 68581879 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 68581894 and 68581903.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68581993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34290971 + 34290972.

It is an arithmetic number, because the mean of its divisors is an integer number (34290972).

Almost surely, 2^68581943 is an apocalyptic number.

68581943 is a deficient number, since it is larger than the sum of its proper divisors (1).

68581943 is an equidigital number, since it uses as much as digits as its factorization.

68581943 is an evil number, because the sum of its binary digits is even.

The product of its digits is 207360, while the sum is 44.

The square root of 68581943 is about 8281.4215567136. The cubic root of 68581943 is about 409.3265625188.

It can be divided in two parts, 685 and 81943, that added together give a palindrome (82628).

The spelling of 68581943 in words is "sixty-eight million, five hundred eighty-one thousand, nine hundred forty-three".