99980002 has 8 divisors (see below), whose sum is σ = 150356700. Its totient is φ = 49861104.

The previous prime is 99979993. The next prime is 99980003. The reversal of 99980002 is 20008999.

It is a Cunningham number, because it is equal to 9999²+1.

It can be written as a sum of positive squares in 2 ways, for example, as 99980001 + 1 = 9999^2 + 1^2 .

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

It is not an unprimeable number, because it can be changed into a prime (99980003) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 63477 + ... + 65032.

Almost surely, 2^99980002 is an apocalyptic number.

99980002 is a deficient number, since it is larger than the sum of its proper divisors (50376698).

99980002 is a wasteful number, since it uses less digits than its factorization.

99980002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128900.

The product of its (nonzero) digits is 11664, while the sum is 37.

The square root of 99980002 is about 9999.0000500050. Note that the first 4 decimals coincide. The cubic root of 99980002 is about 464.1279404674.

The spelling of 99980002 in words is "ninety-nine million, nine hundred eighty thousand, two".