2189617873 has 2 divisors, whose sum is σ = 2189617874. Its totient is φ = 2189617872.

The previous prime is 2189617849. The next prime is 2189617877. The reversal of 2189617873 is 3787169812.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1954700944 + 234916929 = 44212^2 + 15327^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2189617873 is a prime.

It is a super-2 number, since 2×2189617873² = 9588852859522088258, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2189617873.

It is not a weakly prime, because it can be changed into another prime (2189617877) 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, 1094808936 + 1094808937.

It is an arithmetic number, because the mean of its divisors is an integer number (1094808937).

Almost surely, 2^2189617873 is an apocalyptic number.

It is an amenable number.

2189617873 is a deficient number, since it is larger than the sum of its proper divisors (1).

2189617873 is an equidigital number, since it uses as much as digits as its factorization.

2189617873 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1016064, while the sum is 52.

The square root of 2189617873 is about 46793.3528719625. The cubic root of 2189617873 is about 1298.5423253090.

The spelling of 2189617873 in words is "two billion, one hundred eighty-nine million, six hundred seventeen thousand, eight hundred seventy-three".