68855291 has 2 divisors, whose sum is σ = 68855292. Its totient is φ = 68855290.

The previous prime is 68855273. The next prime is 68855299. The reversal of 68855291 is 19255886.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 68855291 - 2²² = 64660987 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (68855299) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34427645 + 34427646.

It is an arithmetic number, because the mean of its divisors is an integer number (34427646).

Almost surely, 2^68855291 is an apocalyptic number.

68855291 is a deficient number, since it is larger than the sum of its proper divisors (1).

68855291 is an equidigital number, since it uses as much as digits as its factorization.

68855291 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 172800, while the sum is 44.

The square root of 68855291 is about 8297.9088329530. The cubic root of 68855291 is about 409.8696611277.

The spelling of 68855291 in words is "sixty-eight million, eight hundred fifty-five thousand, two hundred ninety-one".