889391665 has 8 divisors (see below), whose sum is σ = 1085359680. Its totient is φ = 699453552.

The previous prime is 889391663. The next prime is 889391677. The reversal of 889391665 is 566193988.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 889391665 - 2¹ = 889391663 is a prime.

It is not an unprimeable number, because it can be changed into a prime (889391663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1507149 + ... + 1507738.

It is an arithmetic number, because the mean of its divisors is an integer number (135669960).

Almost surely, 2^889391665 is an apocalyptic number.

It is an amenable number.

889391665 is a deficient number, since it is larger than the sum of its proper divisors (195968015).

889391665 is a wasteful number, since it uses less digits than its factorization.

889391665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3014951.

The product of its digits is 2799360, while the sum is 55.

The square root of 889391665 is about 29822.6703197417. The cubic root of 889391665 is about 961.6809615274.

The spelling of 889391665 in words is "eight hundred eighty-nine million, three hundred ninety-one thousand, six hundred sixty-five".