998870319 has 16 divisors (see below), whose sum is σ = 1480563040. Its totient is φ = 665573760.

The previous prime is 998870317. The next prime is 998870321. The reversal of 998870319 is 913078899.

It is an interprime number because it is at equal distance from previous prime (998870317) and next prime (998870321).

It is not a de Polignac number, because 998870319 - 2¹ = 998870317 is a prime.

It is a super-2 number, since 2×998870319² = 1995483828358323522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (998870317) 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 15 ways as a sum of consecutive naturals, for example, 51639 + ... + 68295.

It is an arithmetic number, because the mean of its divisors is an integer number (92535190).

Almost surely, 2^998870319 is an apocalyptic number.

998870319 is the 19989-th heptagonal number.

998870319 is a deficient number, since it is larger than the sum of its proper divisors (481692721).

998870319 is a wasteful number, since it uses less digits than its factorization.

998870319 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18887 (or 18881 counting only the distinct ones).

The product of its (nonzero) digits is 979776, while the sum is 54.

The square root of 998870319 is about 31604.9097293443. The cubic root of 998870319 is about 999.6232977799.

The spelling of 998870319 in words is "nine hundred ninety-eight million, eight hundred seventy thousand, three hundred nineteen".