998839871 has 8 divisors (see below), whose sum is σ = 1033764864. Its totient is φ = 964083960.

The previous prime is 998839799. The next prime is 998839873. The reversal of 998839871 is 178938899.

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 998839871 - 2¹⁴ = 998823487 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 (998839873) 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, 30191 + ... + 53936.

It is an arithmetic number, because the mean of its divisors is an integer number (129220608).

Almost surely, 2^998839871 is an apocalyptic number.

998839871 is a deficient number, since it is larger than the sum of its proper divisors (34924993).

998839871 is a wasteful number, since it uses less digits than its factorization.

998839871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84541.

The product of its digits is 7838208, while the sum is 62.

The square root of 998839871 is about 31604.4280283634. The cubic root of 998839871 is about 999.6131406925.

The spelling of 998839871 in words is "nine hundred ninety-eight million, eight hundred thirty-nine thousand, eight hundred seventy-one".