2127661187 has 2 divisors, whose sum is σ = 2127661188. Its totient is φ = 2127661186.

The previous prime is 2127661181. The next prime is 2127661201. The reversal of 2127661187 is 7811667212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2127661187 - 2²⁰ = 2126612611 is a prime.

It is not a weakly prime, because it can be changed into another prime (2127661181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1063830593 + 1063830594.

It is an arithmetic number, because the mean of its divisors is an integer number (1063830594).

Almost surely, 2^2127661187 is an apocalyptic number.

2127661187 is a deficient number, since it is larger than the sum of its proper divisors (1).

2127661187 is an equidigital number, since it uses as much as digits as its factorization.

2127661187 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 56448, while the sum is 41.

The square root of 2127661187 is about 46126.5778808704. The cubic root of 2127661187 is about 1286.1772507581.

The spelling of 2127661187 in words is "two billion, one hundred twenty-seven million, six hundred sixty-one thousand, one hundred eighty-seven".