981884111 has 16 divisors (see below), whose sum is σ = 1093010688. Its totient is φ = 875923200.

The previous prime is 981884093. The next prime is 981884143. The reversal of 981884111 is 111488189.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 981884111 - 2⁶ = 981884047 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 (981884411) 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, 440981 + ... + 443201.

It is an arithmetic number, because the mean of its divisors is an integer number (68313168).

Almost surely, 2^981884111 is an apocalyptic number.

981884111 is a deficient number, since it is larger than the sum of its proper divisors (111126577).

981884111 is a wasteful number, since it uses less digits than its factorization.

981884111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3362.

The product of its digits is 18432, while the sum is 41.

The square root of 981884111 is about 31335.0300941295. The cubic root of 981884111 is about 993.9245337948.

The spelling of 981884111 in words is "nine hundred eighty-one million, eight hundred eighty-four thousand, one hundred eleven".