2021959 has 2 divisors, whose sum is σ = 2021960. Its totient is φ = 2021958.

The previous prime is 2021933. The next prime is 2022011. The reversal of 2021959 is 9591202.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2021959 - 2⁵ = 2021927 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2021659) 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, 1010979 + 1010980.

It is an arithmetic number, because the mean of its divisors is an integer number (1010980).

2^2021959 is an apocalyptic number.

2021959 is a deficient number, since it is larger than the sum of its proper divisors (1).

2021959 is an equidigital number, since it uses as much as digits as its factorization.

2021959 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1620, while the sum is 28.

The square root of 2021959 is about 1421.9560471407. The cubic root of 2021959 is about 126.4515377280.

The spelling of 2021959 in words is "two million, twenty-one thousand, nine hundred fifty-nine".