201998002 has 4 divisors (see below), whose sum is σ = 302997006. Its totient is φ = 100999000.

The previous prime is 201997973. The next prime is 201998011. The reversal of 201998002 is 200899102.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 129254161 + 72743841 = 11369^2 + 8529^2 .

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50499499 + ... + 50499502.

Almost surely, 2^201998002 is an apocalyptic number.

201998002 is a deficient number, since it is larger than the sum of its proper divisors (100999004).

201998002 is a wasteful number, since it uses less digits than its factorization.

201998002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100999003.

The product of its (nonzero) digits is 2592, while the sum is 31.

The square root of 201998002 is about 14212.6001139834. The cubic root of 201998002 is about 586.7444963175.

The spelling of 201998002 in words is "two hundred one million, nine hundred ninety-eight thousand, two".