68243771 has 2 divisors, whose sum is σ = 68243772. Its totient is φ = 68243770.

The previous prime is 68243753. The next prime is 68243779. The reversal of 68243771 is 17734286.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 68243771 - 2²² = 64049467 is a prime.

It is a super-3 number, since 3×68243771³ (a number of 24 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (68243779) 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, 34121885 + 34121886.

It is an arithmetic number, because the mean of its divisors is an integer number (34121886).

Almost surely, 2^68243771 is an apocalyptic number.

68243771 is a deficient number, since it is larger than the sum of its proper divisors (1).

68243771 is an equidigital number, since it uses as much as digits as its factorization.

68243771 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 56448, while the sum is 38.

The square root of 68243771 is about 8260.9788160968. The cubic root of 68243771 is about 408.6526682996.

The spelling of 68243771 in words is "sixty-eight million, two hundred forty-three thousand, seven hundred seventy-one".