998788117 has 8 divisors (see below), whose sum is σ = 1034015616. Its totient is φ = 964143072.

The previous prime is 998788111. The next prime is 998788151. The reversal of 998788117 is 711887899.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-998788117 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 (998788111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 142123 + ... + 148984.

It is an arithmetic number, because the mean of its divisors is an integer number (129251952).

Almost surely, 2^998788117 is an apocalyptic number.

It is an amenable number.

998788117 is a deficient number, since it is larger than the sum of its proper divisors (35227499).

998788117 is a wasteful number, since it uses less digits than its factorization.

998788117 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 291227.

The product of its digits is 2032128, while the sum is 58.

The square root of 998788117 is about 31603.6092400852. The cubic root of 998788117 is about 999.5958757056.

The spelling of 998788117 in words is "nine hundred ninety-eight million, seven hundred eighty-eight thousand, one hundred seventeen".