68510591 has 2 divisors, whose sum is σ = 68510592. Its totient is φ = 68510590.

The previous prime is 68510539. The next prime is 68510597. The reversal of 68510591 is 19501586.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68510591 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68510597) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34255295 + 34255296.

It is an arithmetic number, because the mean of its divisors is an integer number (34255296).

Almost surely, 2^68510591 is an apocalyptic number.

68510591 is a deficient number, since it is larger than the sum of its proper divisors (1).

68510591 is an equidigital number, since it uses as much as digits as its factorization.

68510591 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10800, while the sum is 35.

The square root of 68510591 is about 8277.1124796030. The cubic root of 68510591 is about 409.1845601096.

The spelling of 68510591 in words is "sixty-eight million, five hundred ten thousand, five hundred ninety-one".