998459999 has 8 divisors (see below), whose sum is σ = 1002354000. Its totient is φ = 994574592.

The previous prime is 998459989. The next prime is 998460011. The reversal of 998459999 is 999954899.

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 998459999 - 2⁸ = 998459743 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 (998459989) 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, 313487 + ... + 316655.

It is an arithmetic number, because the mean of its divisors is an integer number (125294250).

Almost surely, 2^998459999 is an apocalyptic number.

998459999 is a deficient number, since it is larger than the sum of its proper divisors (3894001).

998459999 is a wasteful number, since it uses less digits than its factorization.

998459999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4297.

The product of its digits is 85030560, while the sum is 71.

The square root of 998459999 is about 31598.4176660794. The cubic root of 998459999 is about 999.4864025962.

The spelling of 998459999 in words is "nine hundred ninety-eight million, four hundred fifty-nine thousand, nine hundred ninety-nine".