2020091 has 2 divisors, whose sum is σ = 2020092. Its totient is φ = 2020090.

The previous prime is 2020079. The next prime is 2020147. The reversal of 2020091 is 1900202.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2020091 - 2⁶ = 2020027 is a prime.

It is not a weakly prime, because it can be changed into another prime (2020001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1010045 + 1010046.

It is an arithmetic number, because the mean of its divisors is an integer number (1010046).

2^2020091 is an apocalyptic number.

2020091 is a deficient number, since it is larger than the sum of its proper divisors (1).

2020091 is an equidigital number, since it uses as much as digits as its factorization.

2020091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36, while the sum is 14.

The square root of 2020091 is about 1421.2990536829. The cubic root of 2020091 is about 126.4125847041.

Adding to 2020091 its reverse (1900202), we get a palindrome (3920293).

The spelling of 2020091 in words is "two million, twenty thousand, ninety-one".