2163591889 has 2 divisors, whose sum is σ = 2163591890. Its totient is φ = 2163591888.

The previous prime is 2163591863. The next prime is 2163591907. The reversal of 2163591889 is 9881953612.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1332250000 + 831341889 = 36500^2 + 28833^2 .

It is a cyclic number.

It is not a de Polignac number, because 2163591889 - 2¹⁵ = 2163559121 is a prime.

It is a super-2 number, since 2×2163591889² = 9362259724293176642, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2163591809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1081795944 + 1081795945.

It is an arithmetic number, because the mean of its divisors is an integer number (1081795945).

Almost surely, 2^2163591889 is an apocalyptic number.

It is an amenable number.

2163591889 is a deficient number, since it is larger than the sum of its proper divisors (1).

2163591889 is an equidigital number, since it uses as much as digits as its factorization.

2163591889 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 933120, while the sum is 52.

The square root of 2163591889 is about 46514.4266760325. The cubic root of 2163591889 is about 1293.3769440884.

The spelling of 2163591889 in words is "two billion, one hundred sixty-three million, five hundred ninety-one thousand, eight hundred eighty-nine".