1998984073 has 8 divisors (see below), whose sum is σ = 2093433408. Its totient is φ = 1905162864.

The previous prime is 1998984059. The next prime is 1998984079. The reversal of 1998984073 is 3704898991.

It is a happy number.

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

It is a de Polignac number, because none of the positive numbers 2^k-1998984073 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1998983999 and 1998984017.

It is not an unprimeable number, because it can be changed into a prime (1998984079) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 150511 + ... + 163252.

It is an arithmetic number, because the mean of its divisors is an integer number (261679176).

Almost surely, 2^1998984073 is an apocalyptic number.

It is an amenable number.

1998984073 is a deficient number, since it is larger than the sum of its proper divisors (94449335).

1998984073 is a wasteful number, since it uses less digits than its factorization.

1998984073 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 314063.

The product of its (nonzero) digits is 3919104, while the sum is 58.

The square root of 1998984073 is about 44709.9996980541. Note that the first 3 decimals coincide. The cubic root of 1998984073 is about 1259.7076824611.

The spelling of 1998984073 in words is "one billion, nine hundred ninety-eight million, nine hundred eighty-four thousand, seventy-three".