981119971 has 8 divisors (see below), whose sum is σ = 1079072064. Its totient is φ = 886379520.

The previous prime is 981119957. The next prime is 981119977. The reversal of 981119971 is 179911189.

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

It is not a de Polignac number, because 981119971 - 2¹⁵ = 981087203 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (981119977) 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 7 ways as a sum of consecutive naturals, for example, 802270 + ... + 803491.

It is an arithmetic number, because the mean of its divisors is an integer number (134884008).

Almost surely, 2^981119971 is an apocalyptic number.

981119971 is a deficient number, since it is larger than the sum of its proper divisors (97952093).

981119971 is a wasteful number, since it uses less digits than its factorization.

981119971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1605821.

The product of its digits is 40824, while the sum is 46.

The square root of 981119971 is about 31322.8346578020. The cubic root of 981119971 is about 993.6666301063. Note that the first 4 decimals are identical.

The spelling of 981119971 in words is "nine hundred eighty-one million, one hundred nineteen thousand, nine hundred seventy-one".