202001999 has 2 divisors, whose sum is σ = 202002000. Its totient is φ = 202001998.

The previous prime is 202001959. The next prime is 202002001. The reversal of 202001999 is 999100202.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-202001999 is a prime.

Together with 202002001, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (202001909) by changing a digit.

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, 101000999 + 101001000.

It is an arithmetic number, because the mean of its divisors is an integer number (101001000).

Almost surely, 2^202001999 is an apocalyptic number.

202001999 is a deficient number, since it is larger than the sum of its proper divisors (1).

202001999 is an equidigital number, since it uses as much as digits as its factorization.

202001999 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2916, while the sum is 32.

The square root of 202001999 is about 14212.7407279525. The cubic root of 202001999 is about 586.7483663265.

The spelling of 202001999 in words is "two hundred two million, one thousand, nine hundred ninety-nine".