268129111 has 2 divisors, whose sum is σ = 268129112. Its totient is φ = 268129110.

The previous prime is 268128989. The next prime is 268129133. The reversal of 268129111 is 111921862.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 268129111 - 2⁹ = 268128599 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (268129171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 134064555 + 134064556.

It is an arithmetic number, because the mean of its divisors is an integer number (134064556).

Almost surely, 2^268129111 is an apocalyptic number.

268129111 is a deficient number, since it is larger than the sum of its proper divisors (1).

268129111 is an equidigital number, since it uses as much as digits as its factorization.

268129111 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1728, while the sum is 31.

The square root of 268129111 is about 16374.6484237067. The cubic root of 268129111 is about 644.8340906932.

The spelling of 268129111 in words is "two hundred sixty-eight million, one hundred twenty-nine thousand, one hundred eleven".