981841889 has 16 divisors (see below), whose sum is σ = 1174634496. Its totient is φ = 802947600.

The previous prime is 981841877. The next prime is 981841969. The reversal of 981841889 is 988148189.

It is a de Polignac number, because none of the positive numbers 2^k-981841889 is a prime.

It is not an unprimeable number, because it can be changed into a prime (981841829) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16457 + ... + 47270.

It is an arithmetic number, because the mean of its divisors is an integer number (73414656).

Almost surely, 2^981841889 is an apocalyptic number.

It is an amenable number.

981841889 is a deficient number, since it is larger than the sum of its proper divisors (192792607).

981841889 is a wasteful number, since it uses less digits than its factorization.

981841889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63836.

The product of its digits is 1327104, while the sum is 56.

The square root of 981841889 is about 31334.3563680507. The cubic root of 981841889 is about 993.9102870072.

The spelling of 981841889 in words is "nine hundred eighty-one million, eight hundred forty-one thousand, eight hundred eighty-nine".