1998647114 has 8 divisors (see below), whose sum is σ = 3101349060. Its totient is φ = 964864096.

The previous prime is 1998647113. The next prime is 1998647117. The reversal of 1998647114 is 4117468991.

It can be written as a sum of positive squares in 2 ways, for example, as 1884862225 + 113784889 = 43415^2 + 10667^2 .

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

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1998647113) 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 3 ways as a sum of consecutive naturals, for example, 17229659 + ... + 17229774.

Almost surely, 2^1998647114 is an apocalyptic number.

1998647114 is a deficient number, since it is larger than the sum of its proper divisors (1102701946).

1998647114 is a wasteful number, since it uses less digits than its factorization.

1998647114 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34459464.

The product of its digits is 435456, while the sum is 50.

The square root of 1998647114 is about 44706.2312658985. The cubic root of 1998647114 is about 1259.6368975560.

The spelling of 1998647114 in words is "one billion, nine hundred ninety-eight million, six hundred forty-seven thousand, one hundred fourteen".