68591563 has 2 divisors, whose sum is σ = 68591564. Its totient is φ = 68591562.

The previous prime is 68591527. The next prime is 68591569. The reversal of 68591563 is 36519586.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68591563 is a prime.

It is not a weakly prime, because it can be changed into another prime (68591569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34295781 + 34295782.

It is an arithmetic number, because the mean of its divisors is an integer number (34295782).

Almost surely, 2^68591563 is an apocalyptic number.

68591563 is a deficient number, since it is larger than the sum of its proper divisors (1).

68591563 is an equidigital number, since it uses as much as digits as its factorization.

68591563 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 194400, while the sum is 43.

The square root of 68591563 is about 8282.0023545034. The cubic root of 68591563 is about 409.3457003912.

The spelling of 68591563 in words is "sixty-eight million, five hundred ninety-one thousand, five hundred sixty-three".