889716671 has 4 divisors (see below), whose sum is σ = 906503832. Its totient is φ = 872929512.

The previous prime is 889716589. The next prime is 889716673. The reversal of 889716671 is 176617988.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-889716671 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (53), and also a Moran number because the ratio is a prime number: 16787107 = 889716671 / (8 + 8 + 9 + 7 + 1 + 6 + 6 + 7 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (889716673) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8393501 + ... + 8393606.

It is an arithmetic number, because the mean of its divisors is an integer number (226625958).

Almost surely, 2^889716671 is an apocalyptic number.

889716671 is a deficient number, since it is larger than the sum of its proper divisors (16787161).

889716671 is a wasteful number, since it uses less digits than its factorization.

889716671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16787160.

The product of its digits is 1016064, while the sum is 53.

The square root of 889716671 is about 29828.1187975373. The cubic root of 889716671 is about 961.7980880350.

The spelling of 889716671 in words is "eight hundred eighty-nine million, seven hundred sixteen thousand, six hundred seventy-one".