1002002002 has 4 divisors (see below), whose sum is σ = 1503003006. Its totient is φ = 501001000.

The previous prime is 1002001991. The next prime is 1002002009. The reversal of 1002002002 is 2002002001.

It is a happy number.

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., 879656281 + 122345721 = 29659^2 + 11061^2 .

1002002002 is a modest number, since divided by 2002 gives 1002 as remainder.

It is not an unprimeable number, because it can be changed into a prime (1002002009) 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 as a sum of consecutive naturals, namely, 250500499 + ... + 250500502.

Almost surely, 2^1002002002 is an apocalyptic number.

1002002002 is a deficient number, since it is larger than the sum of its proper divisors (501001004).

1002002002 is an equidigital number, since it uses as much as digits as its factorization.

1002002002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 501001003.

The product of its (nonzero) digits is 8, while the sum is 7.

The square root of 1002002002 is about 31654.4152054654. The cubic root of 1002002002 is about 1000.6668891600. Note that the first 3 decimals are identical.

Adding to 1002002002 its reverse (2002002001), we get a palindrome (3004004003).

Subtracting 1002002002 from its reverse (2002002001), we obtain a palindrome (999999999).

The spelling of 1002002002 in words is "one billion, two million, two thousand, two".