202002001 has 2 divisors, whose sum is σ = 202002002. Its totient is φ = 202002000.

The previous prime is 202001999. The next prime is 202002013. The reversal of 202002001 is 100200202.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 121881600 + 80120401 = 11040^2 + 8951^2 .

It is a cyclic number.

It is not a de Polignac number, because 202002001 - 2¹ = 202001999 is a prime.

Together with 202001999, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (202002061) by changing a digit.

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, 101001000 + 101001001.

It is an arithmetic number, because the mean of its divisors is an integer number (101001001).

Almost surely, 2^202002001 is an apocalyptic number.

It is an amenable number.

202002001 is a deficient number, since it is larger than the sum of its proper divisors (1).

202002001 is an equidigital number, since it uses as much as digits as its factorization.

202002001 is an odious number, because the sum of its binary digits is odd.

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

The square root of 202002001 is about 14212.7407983119. The cubic root of 202002001 is about 586.7483682630.

Adding to 202002001 its reverse (100200202), we get a palindrome (302202203).

It can be divided in two parts, 20200 and 2001, that added together give a square (22201 = 149²).

The spelling of 202002001 in words is "two hundred two million, two thousand, one".