2161590589 has 2 divisors, whose sum is σ = 2161590590. Its totient is φ = 2161590588.

The previous prime is 2161590569. The next prime is 2161590619. The reversal of 2161590589 is 9850951612.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1788444100 + 373146489 = 42290^2 + 19317^2 .

It is a cyclic number.

It is not a de Polignac number, because 2161590589 - 2¹⁵ = 2161557821 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2161590569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1080795294 + 1080795295.

It is an arithmetic number, because the mean of its divisors is an integer number (1080795295).

Almost surely, 2^2161590589 is an apocalyptic number.

It is an amenable number.

2161590589 is a deficient number, since it is larger than the sum of its proper divisors (1).

2161590589 is an equidigital number, since it uses as much as digits as its factorization.

2161590589 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 194400, while the sum is 46.

The square root of 2161590589 is about 46492.9090184729. The cubic root of 2161590589 is about 1292.9780343258.

The spelling of 2161590589 in words is "two billion, one hundred sixty-one million, five hundred ninety thousand, five hundred eighty-nine".