989827971 has 32 divisors (see below), whose sum is σ = 1567814400. Its totient is φ = 548714880.

The previous prime is 989827903. The next prime is 989827973. The reversal of 989827971 is 179728989.

It is not a de Polignac number, because 989827971 - 2⁷ = 989827843 is a prime.

It is not an unprimeable number, because it can be changed into a prime (989827973) 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 31 ways as a sum of consecutive naturals, for example, 9036 + ... + 45401.

It is an arithmetic number, because the mean of its divisors is an integer number (48994200).

Almost surely, 2^989827971 is an apocalyptic number.

989827971 is a deficient number, since it is larger than the sum of its proper divisors (577986429).

989827971 is a wasteful number, since it uses less digits than its factorization.

989827971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54499.

The product of its digits is 4572288, while the sum is 60.

The square root of 989827971 is about 31461.5316060741. The cubic root of 989827971 is about 996.5977615675.

It can be divided in two parts, 98982 and 7971, that added together give a triangular number (106953 = T₄₆₂).

The spelling of 989827971 in words is "nine hundred eighty-nine million, eight hundred twenty-seven thousand, nine hundred seventy-one".