999998000002 has 16 divisors (see below), whose sum is σ = 1550679391800. Its totient is φ = 483328632960.

The previous prime is 999997999981. The next prime is 999998000009. The reversal of 999998000002 is 200000899999.

It is a Cunningham number, because it is equal to 999999²+1.

It can be written as a sum of positive squares in 4 ways, for example, as 874844079561 + 125153920441 = 935331^2 + 353771^2 .

It is a junction number, because it is equal to n+sod(n) for n = 999997999898 and 999997999907.

It is not an unprimeable number, because it can be changed into a prime (999998000009) 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, 55931877 + ... + 55949752.

Almost surely, 2^999998000002 is an apocalyptic number.

999998000002 is a deficient number, since it is larger than the sum of its proper divisors (550681391798).

999998000002 is a wasteful number, since it uses less digits than its factorization.

999998000002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111881781.

The product of its (nonzero) digits is 944784, while the sum is 55.

The spelling of 999998000002 in words is "nine hundred ninety-nine billion, nine hundred ninety-eight million, two", and thus it is an aban number.