268214981 has 2 divisors, whose sum is σ = 268214982. Its totient is φ = 268214980.

The previous prime is 268214959. The next prime is 268214993. The reversal of 268214981 is 189412862.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 261630625 + 6584356 = 16175^2 + 2566^2 .

It is a cyclic number.

It is not a de Polignac number, because 268214981 - 2⁶ = 268214917 is a prime.

It is a super-2 number, since 2×268214981² = 143878552065660722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (268214911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 134107490 + 134107491.

It is an arithmetic number, because the mean of its divisors is an integer number (134107491).

Almost surely, 2^268214981 is an apocalyptic number.

It is an amenable number.

268214981 is a deficient number, since it is larger than the sum of its proper divisors (1).

268214981 is an equidigital number, since it uses as much as digits as its factorization.

268214981 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 55296, while the sum is 41.

The square root of 268214981 is about 16377.2702548380. The cubic root of 268214981 is about 644.9029207097.

The spelling of 268214981 in words is "two hundred sixty-eight million, two hundred fourteen thousand, nine hundred eighty-one".