981646189 has 8 divisors (see below), whose sum is σ = 1000692000. Its totient is φ = 962680752.

The previous prime is 981646157. The next prime is 981646199.

981646189 is nontrivially palindromic in base 10.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 981646189 - 2⁵ = 981646157 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (981646129) 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 7 ways as a sum of consecutive naturals, for example, 4867 + ... + 44575.

It is an arithmetic number, because the mean of its divisors is an integer number (125086500).

Almost surely, 2^981646189 is an apocalyptic number.

It is an amenable number.

981646189 is a deficient number, since it is larger than the sum of its proper divisors (19045811).

981646189 is a wasteful number, since it uses less digits than its factorization.

981646189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40187.

The product of its digits is 746496, while the sum is 52.

The square root of 981646189 is about 31331.2334420463. The cubic root of 981646189 is about 993.8442474646.

The spelling of 981646189 in words is "nine hundred eighty-one million, six hundred forty-six thousand, one hundred eighty-nine".