268000081 has 2 divisors, whose sum is σ = 268000082. Its totient is φ = 268000080.

The previous prime is 268000069. The next prime is 268000141. The reversal of 268000081 is 180000862.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 151683856 + 116316225 = 12316^2 + 10785^2 .

It is a cyclic number.

It is not a de Polignac number, because 268000081 - 2¹⁷ = 267869009 is a prime.

It is a super-2 number, since 2×268000081² = 143648086832013122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (268000001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 134000040 + 134000041.

It is an arithmetic number, because the mean of its divisors is an integer number (134000041).

Almost surely, 2^268000081 is an apocalyptic number.

It is an amenable number.

268000081 is a deficient number, since it is larger than the sum of its proper divisors (1).

268000081 is an equidigital number, since it uses as much as digits as its factorization.

268000081 is an evil number, because the sum of its binary digits is even.

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

The square root of 268000081 is about 16370.7080176760. The cubic root of 268000081 is about 644.7306376809.

The spelling of 268000081 in words is "two hundred sixty-eight million, eighty-one", and thus it is an aban number.