989812143 has 36 divisors (see below), whose sum is σ = 1510396680. Its totient is φ = 648436752.

The previous prime is 989812129. The next prime is 989812147. The reversal of 989812143 is 341218989.

It is not a de Polignac number, because 989812143 - 2⁴ = 989812127 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (989812147) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 385821 + ... + 388377.

Almost surely, 2^989812143 is an apocalyptic number.

989812143 is a deficient number, since it is larger than the sum of its proper divisors (520584537).

989812143 is an frugal number, since it uses more digits than its factorization.

989812143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2640 (or 2619 counting only the distinct ones).

The product of its digits is 124416, while the sum is 45.

The square root of 989812143 is about 31461.2800597814. The cubic root of 989812143 is about 996.5924494548.

It can be divided in two parts, 98981 and 2143, that added together give a square (101124 = 318²).

The spelling of 989812143 in words is "nine hundred eighty-nine million, eight hundred twelve thousand, one hundred forty-three".