989671 has 2 divisors, whose sum is σ = 989672. Its totient is φ = 989670.
The previous prime is 989663. The next prime is 989687. The reversal of 989671 is 176989.
It is a weak prime.
It is an emirp because it is prime and its reverse (176989) is a distict prime.
It is a cyclic number.
It is not a de Polignac number, because 989671 - 23 = 989663 is a prime.
It is a Chen prime.
It is an Ulam number.
It is a zygodrome in base 2.
It is a congruent number.
It is not a weakly prime, because it can be changed into another prime (989641) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (13) of ones.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 494835 + 494836.
It is an arithmetic number, because the mean of its divisors is an integer number (494836).
2989671 is an apocalyptic number.
989671 is a deficient number, since it is larger than the sum of its proper divisors (1).
989671 is an equidigital number, since it uses as much as digits as its factorization.
989671 is an odious number, because the sum of its binary digits is odd.
The product of its digits is 27216, while the sum is 40.
The square root of 989671 is about 994.8220946481. The cubic root of 989671 is about 99.6545077255.
The spelling of 989671 in words is "nine hundred eighty-nine thousand, six hundred seventy-one".
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