68000281 has 2 divisors, whose sum is σ = 68000282. Its totient is φ = 68000280.

The previous prime is 68000239. The next prime is 68000287. The reversal of 68000281 is 18200086.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 43349056 + 24651225 = 6584^2 + 4965^2 .

It is a cyclic number.

It is not a de Polignac number, because 68000281 - 2¹⁷ = 67869209 is a prime.

It is a super-2 number, since 2×68000281² = 9248076432157922, which contains 22 as substring.

It is equal to p_4007356 and since 68000281 and 4007356 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (68000287) 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, 34000140 + 34000141.

It is an arithmetic number, because the mean of its divisors is an integer number (34000141).

Almost surely, 2^68000281 is an apocalyptic number.

It is an amenable number.

68000281 is a deficient number, since it is larger than the sum of its proper divisors (1).

68000281 is an equidigital number, since it uses as much as digits as its factorization.

68000281 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 768, while the sum is 25.

The square root of 68000281 is about 8246.2282893454. The cubic root of 68000281 is about 408.1660724189.

The spelling of 68000281 in words is "sixty-eight million, two hundred eighty-one", and thus it is an aban number.