268488281 has 2 divisors, whose sum is σ = 268488282. Its totient is φ = 268488280.

The previous prime is 268488271. The next prime is 268488323. The reversal of 268488281 is 182884862.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 246772681 + 21715600 = 15709^2 + 4660^2 .

It is a cyclic number.

It is not a de Polignac number, because 268488281 - 2⁶ = 268488217 is a prime.

It is a super-2 number, since 2×268488281² = 144171914068669922, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (268488271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 134244140 + 134244141.

It is an arithmetic number, because the mean of its divisors is an integer number (134244141).

Almost surely, 2^268488281 is an apocalyptic number.

It is an amenable number.

268488281 is a deficient number, since it is larger than the sum of its proper divisors (1).

268488281 is an equidigital number, since it uses as much as digits as its factorization.

268488281 is an evil number, because the sum of its binary digits is even.

The product of its digits is 393216, while the sum is 47.

The square root of 268488281 is about 16385.6120117620. The cubic root of 268488281 is about 645.1218895097.

The spelling of 268488281 in words is "two hundred sixty-eight million, four hundred eighty-eight thousand, two hundred eighty-one".