68812291 has 2 divisors, whose sum is σ = 68812292. Its totient is φ = 68812290.

The previous prime is 68812259. The next prime is 68812301. The reversal of 68812291 is 19221886.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 68812291 - 2⁵ = 68812259 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 68812291.

It is not a weakly prime, because it can be changed into another prime (68815291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34406145 + 34406146.

It is an arithmetic number, because the mean of its divisors is an integer number (34406146).

Almost surely, 2^68812291 is an apocalyptic number.

68812291 is a deficient number, since it is larger than the sum of its proper divisors (1).

68812291 is an equidigital number, since it uses as much as digits as its factorization.

68812291 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13824, while the sum is 37.

The square root of 68812291 is about 8295.3174140596. The cubic root of 68812291 is about 409.7843224159.

The spelling of 68812291 in words is "sixty-eight million, eight hundred twelve thousand, two hundred ninety-one".