981127899 has 12 divisors (see below), whose sum is σ = 1426698000. Its totient is φ = 649694544.

The previous prime is 981127877. The next prime is 981127921. The reversal of 981127899 is 998721189.

It is an interprime number because it is at equal distance from previous prime (981127877) and next prime (981127921).

It is not a de Polignac number, because 981127899 - 2¹⁵ = 981095131 is a prime.

It is a super-3 number, since 3×981127899³ (a number of 28 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (981107899) 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 11 ways as a sum of consecutive naturals, for example, 364479 + ... + 367160.

It is an arithmetic number, because the mean of its divisors is an integer number (118891500).

Almost surely, 2^981127899 is an apocalyptic number.

981127899 is a deficient number, since it is larger than the sum of its proper divisors (445570101).

981127899 is a wasteful number, since it uses less digits than its factorization.

981127899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 731794 (or 731791 counting only the distinct ones).

The product of its digits is 653184, while the sum is 54.

The square root of 981127899 is about 31322.9612105880. The cubic root of 981127899 is about 993.6693065604.

The spelling of 981127899 in words is "nine hundred eighty-one million, one hundred twenty-seven thousand, eight hundred ninety-nine".