202002000091 has 4 divisors (see below), whose sum is σ = 206928878184. Its totient is φ = 197075122000.

The previous prime is 202002000077. The next prime is 202002000113. The reversal of 202002000091 is 190000200202.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 202002000091 - 2⁷ = 202001999963 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (202002000001) 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, 2463438985 + ... + 2463439066.

It is an arithmetic number, because the mean of its divisors is an integer number (51732219546).

Almost surely, 2^202002000091 is an apocalyptic number.

202002000091 is a deficient number, since it is larger than the sum of its proper divisors (4926878093).

202002000091 is an equidigital number, since it uses as much as digits as its factorization.

202002000091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4926878092.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 202002000091 its reverse (190000200202), we get a palindrome (392002200293).

The spelling of 202002000091 in words is "two hundred two billion, two million, ninety-one", and thus it is an aban number.