811984489 has 2 divisors, whose sum is σ = 811984490. Its totient is φ = 811984488.

The previous prime is 811984487. The next prime is 811984493. The reversal of 811984489 is 984489118.

811984489 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 660078864 + 151905625 = 25692^2 + 12325^2 .

It is a cyclic number.

It is not a de Polignac number, because 811984489 - 2¹ = 811984487 is a prime.

It is a super-2 number, since 2×811984489² = 1318637620753182242, which contains 22 as substring.

Together with 811984487, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (811984487) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 405992244 + 405992245.

It is an arithmetic number, because the mean of its divisors is an integer number (405992245).

Almost surely, 2^811984489 is an apocalyptic number.

It is an amenable number.

811984489 is a deficient number, since it is larger than the sum of its proper divisors (1).

811984489 is an equidigital number, since it uses as much as digits as its factorization.

811984489 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 663552, while the sum is 52.

The square root of 811984489 is about 28495.3415315556. The cubic root of 811984489 is about 932.9303986767.

The spelling of 811984489 in words is "eight hundred eleven million, nine hundred eighty-four thousand, four hundred eighty-nine".