818085731 has 2 divisors, whose sum is σ = 818085732. Its totient is φ = 818085730.

The previous prime is 818085703. The next prime is 818085743. The reversal of 818085731 is 137580818.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 818085731 - 2²⁶ = 750976867 is a prime.

It is a super-2 number, since 2×818085731² = 1338528526531608722, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (818085031) 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, 409042865 + 409042866.

It is an arithmetic number, because the mean of its divisors is an integer number (409042866).

Almost surely, 2^818085731 is an apocalyptic number.

818085731 is a deficient number, since it is larger than the sum of its proper divisors (1).

818085731 is an equidigital number, since it uses as much as digits as its factorization.

818085731 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 53760, while the sum is 41.

The square root of 818085731 is about 28602.1980099432. The cubic root of 818085731 is about 935.2612464532.

The spelling of 818085731 in words is "eight hundred eighteen million, eighty-five thousand, seven hundred thirty-one".