889400891 has 2 divisors, whose sum is σ = 889400892. Its totient is φ = 889400890.

The previous prime is 889400879. The next prime is 889400893. The reversal of 889400891 is 198004988.

889400891 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 889400891 - 2¹⁰ = 889399867 is a prime.

Together with 889400893, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (889400893) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 444700445 + 444700446.

It is an arithmetic number, because the mean of its divisors is an integer number (444700446).

Almost surely, 2^889400891 is an apocalyptic number.

889400891 is a deficient number, since it is larger than the sum of its proper divisors (1).

889400891 is an equidigital number, since it uses as much as digits as its factorization.

889400891 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 165888, while the sum is 47.

The square root of 889400891 is about 29822.8250003248. The cubic root of 889400891 is about 961.6842868108.

The spelling of 889400891 in words is "eight hundred eighty-nine million, four hundred thousand, eight hundred ninety-one".