889105721 has 8 divisors (see below), whose sum is σ = 1037740800. Its totient is φ = 745875648.

The previous prime is 889105691. The next prime is 889105747. The reversal of 889105721 is 127501988.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-889105721 is a prime.

It is a super-2 number, since 2×889105721² = 1581017966229859682, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (889105781) 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 in 7 ways as a sum of consecutive naturals, for example, 1350896 + ... + 1351553.

It is an arithmetic number, because the mean of its divisors is an integer number (129717600).

Almost surely, 2^889105721 is an apocalyptic number.

It is an amenable number.

889105721 is a deficient number, since it is larger than the sum of its proper divisors (148635079).

889105721 is a wasteful number, since it uses less digits than its factorization.

889105721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2702503.

The product of its (nonzero) digits is 40320, while the sum is 41.

The square root of 889105721 is about 29817.8758633139. The cubic root of 889105721 is about 961.5778886868.

The spelling of 889105721 in words is "eight hundred eighty-nine million, one hundred five thousand, seven hundred twenty-one".