68491043 has 2 divisors, whose sum is σ = 68491044. Its totient is φ = 68491042.

The previous prime is 68491039. The next prime is 68491051. The reversal of 68491043 is 34019486.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 68491043 - 2² = 68491039 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 68490994 and 68491012.

It is not a weakly prime, because it can be changed into another prime (68491013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34245521 + 34245522.

It is an arithmetic number, because the mean of its divisors is an integer number (34245522).

Almost surely, 2^68491043 is an apocalyptic number.

68491043 is a deficient number, since it is larger than the sum of its proper divisors (1).

68491043 is an equidigital number, since it uses as much as digits as its factorization.

68491043 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20736, while the sum is 35.

The square root of 68491043 is about 8275.9315487744. The cubic root of 68491043 is about 409.1456391169.

The spelling of 68491043 in words is "sixty-eight million, four hundred ninety-one thousand, forty-three".