889663811 has 2 divisors, whose sum is σ = 889663812. Its totient is φ = 889663810.

The previous prime is 889663807. The next prime is 889663843. The reversal of 889663811 is 118366988.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 889663811 - 2² = 889663807 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 889663811.

It is not a weakly prime, because it can be changed into another prime (889663871) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 444831905 + 444831906.

It is an arithmetic number, because the mean of its divisors is an integer number (444831906).

Almost surely, 2^889663811 is an apocalyptic number.

889663811 is a deficient number, since it is larger than the sum of its proper divisors (1).

889663811 is an equidigital number, since it uses as much as digits as its factorization.

889663811 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 497664, while the sum is 50.

The square root of 889663811 is about 29827.2327077119. The cubic root of 889663811 is about 961.7790401533.

The spelling of 889663811 in words is "eight hundred eighty-nine million, six hundred sixty-three thousand, eight hundred eleven".