818081111 has 2 divisors, whose sum is σ = 818081112. Its totient is φ = 818081110.

The previous prime is 818081093. The next prime is 818081153. The reversal of 818081111 is 111180818.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 818081111 - 2¹⁴ = 818064727 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (818081161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 409040555 + 409040556.

It is an arithmetic number, because the mean of its divisors is an integer number (409040556).

Almost surely, 2^818081111 is an apocalyptic number.

818081111 is a deficient number, since it is larger than the sum of its proper divisors (1).

818081111 is an equidigital number, since it uses as much as digits as its factorization.

818081111 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 512, while the sum is 29.

The square root of 818081111 is about 28602.1172468053. The cubic root of 818081111 is about 935.2594858737.

The spelling of 818081111 in words is "eight hundred eighteen million, eighty-one thousand, one hundred eleven".