9920002 has 4 divisors (see below), whose sum is σ = 14880006. Its totient is φ = 4960000.

The previous prime is 9919997. The next prime is 9920021. The reversal of 9920002 is 2000299.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2000299 = 7 ⋅285757.

It can be written as a sum of positive squares in only one way, i.e., 6456681 + 3463321 = 2541^2 + 1861^2 .

It is a Smith number, since the sum of its digits (22) 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 (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2479999 + ... + 2480002.

Almost surely, 2^9920002 is an apocalyptic number.

9920002 is a deficient number, since it is larger than the sum of its proper divisors (4960004).

9920002 is a wasteful number, since it uses less digits than its factorization.

9920002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4960003.

The product of its (nonzero) digits is 324, while the sum is 22.

The square root of 9920002 is about 3149.6034671050. The cubic root of 9920002 is about 214.8674286378.

The spelling of 9920002 in words is "nine million, nine hundred twenty thousand, two".