68918543 has 2 divisors, whose sum is σ = 68918544. Its totient is φ = 68918542.

The previous prime is 68918539. The next prime is 68918569. The reversal of 68918543 is 34581986.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 68918543 - 2² = 68918539 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 68918494 and 68918503.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68918513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34459271 + 34459272.

It is an arithmetic number, because the mean of its divisors is an integer number (34459272).

Almost surely, 2^68918543 is an apocalyptic number.

68918543 is a deficient number, since it is larger than the sum of its proper divisors (1).

68918543 is an equidigital number, since it uses as much as digits as its factorization.

68918543 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 68918543 is about 8301.7192797637. The cubic root of 68918543 is about 409.9951278422.

The spelling of 68918543 in words is "sixty-eight million, nine hundred eighteen thousand, five hundred forty-three".