68389943 has 2 divisors, whose sum is σ = 68389944. Its totient is φ = 68389942.

The previous prime is 68389931. The next prime is 68390011. The reversal of 68389943 is 34998386.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 68389943 - 2⁸ = 68389687 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 68389891 and 68389900.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68389843) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34194971 + 34194972.

It is an arithmetic number, because the mean of its divisors is an integer number (34194972).

Almost surely, 2^68389943 is an apocalyptic number.

68389943 is a deficient number, since it is larger than the sum of its proper divisors (1).

68389943 is an equidigital number, since it uses as much as digits as its factorization.

68389943 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1119744, while the sum is 50.

The square root of 68389943 is about 8269.8212193493. The cubic root of 68389943 is about 408.9442259497.

The spelling of 68389943 in words is "sixty-eight million, three hundred eighty-nine thousand, nine hundred forty-three".