811985063 has 2 divisors, whose sum is σ = 811985064. Its totient is φ = 811985062.

The previous prime is 811985023. The next prime is 811985071. The reversal of 811985063 is 360589118.

811985063 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 811985063 - 2⁸ = 811984807 is a prime.

It is a super-2 number, since 2×811985063² = 1318639485070227938, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 811985063.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (811985023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 405992531 + 405992532.

It is an arithmetic number, because the mean of its divisors is an integer number (405992532).

Almost surely, 2^811985063 is an apocalyptic number.

811985063 is a deficient number, since it is larger than the sum of its proper divisors (1).

811985063 is an equidigital number, since it uses as much as digits as its factorization.

811985063 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 51840, while the sum is 41.

The square root of 811985063 is about 28495.3516033756. The cubic root of 811985063 is about 932.9306185093.

The spelling of 811985063 in words is "eight hundred eleven million, nine hundred eighty-five thousand, sixty-three".