2001890089 has 2 divisors, whose sum is σ = 2001890090. Its totient is φ = 2001890088.

The previous prime is 2001890057. The next prime is 2001890113. The reversal of 2001890089 is 9800981002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1769632489 + 232257600 = 42067^2 + 15240^2 .

It is a cyclic number.

It is not a de Polignac number, because 2001890089 - 2⁵ = 2001890057 is a prime.

It is not a weakly prime, because it can be changed into another prime (2001890489) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1000945044 + 1000945045.

It is an arithmetic number, because the mean of its divisors is an integer number (1000945045).

Almost surely, 2^2001890089 is an apocalyptic number.

It is an amenable number.

2001890089 is a deficient number, since it is larger than the sum of its proper divisors (1).

2001890089 is an equidigital number, since it uses as much as digits as its factorization.

2001890089 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10368, while the sum is 37.

The square root of 2001890089 is about 44742.4863971595. The cubic root of 2001890089 is about 1260.3178187526.

The spelling of 2001890089 in words is "two billion, one million, eight hundred ninety thousand, eighty-nine".