889105691 has 2 divisors, whose sum is σ = 889105692. Its totient is φ = 889105690.

The previous prime is 889105669. The next prime is 889105747. The reversal of 889105691 is 196501988.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-889105691 is a prime.

It is not a weakly prime, because it can be changed into another prime (889105291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 444552845 + 444552846.

It is an arithmetic number, because the mean of its divisors is an integer number (444552846).

Almost surely, 2^889105691 is an apocalyptic number.

889105691 is a deficient number, since it is larger than the sum of its proper divisors (1).

889105691 is an equidigital number, since it uses as much as digits as its factorization.

889105691 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 155520, while the sum is 47.

The square root of 889105691 is about 29817.8753602600. The cubic root of 889105691 is about 961.5778778717.

The spelling of 889105691 in words is "eight hundred eighty-nine million, one hundred five thousand, six hundred ninety-one".