2188135673 has 2 divisors, whose sum is σ = 2188135674. Its totient is φ = 2188135672.

The previous prime is 2188135667. The next prime is 2188135679. The reversal of 2188135673 is 3765318812.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (2188135667) and next prime (2188135679).

It can be written as a sum of positive squares in only one way, i.e., 1258617529 + 929518144 = 35477^2 + 30488^2 .

It is a cyclic number.

It is not a de Polignac number, because 2188135673 - 2⁴ = 2188135657 is a prime.

It is not a weakly prime, because it can be changed into another prime (2188135679) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1094067836 + 1094067837.

It is an arithmetic number, because the mean of its divisors is an integer number (1094067837).

Almost surely, 2^2188135673 is an apocalyptic number.

It is an amenable number.

2188135673 is a deficient number, since it is larger than the sum of its proper divisors (1).

2188135673 is an equidigital number, since it uses as much as digits as its factorization.

2188135673 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 241920, while the sum is 44.

The square root of 2188135673 is about 46777.5124712719. The cubic root of 2188135673 is about 1298.2492553154.

The spelling of 2188135673 in words is "two billion, one hundred eighty-eight million, one hundred thirty-five thousand, six hundred seventy-three".