2127661597 has 2 divisors, whose sum is σ = 2127661598. Its totient is φ = 2127661596.

The previous prime is 2127661561. The next prime is 2127661609. The reversal of 2127661597 is 7951667212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2019064356 + 108597241 = 44934^2 + 10421^2 .

It is a cyclic number.

It is not a de Polignac number, because 2127661597 - 2²⁷ = 1993443869 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2127661507) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1063830798 + 1063830799.

It is an arithmetic number, because the mean of its divisors is an integer number (1063830799).

Almost surely, 2^2127661597 is an apocalyptic number.

It is an amenable number.

2127661597 is a deficient number, since it is larger than the sum of its proper divisors (1).

2127661597 is an equidigital number, since it uses as much as digits as its factorization.

2127661597 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 317520, while the sum is 46.

The square root of 2127661597 is about 46126.5823251626. The cubic root of 2127661597 is about 1286.1773333735.

The spelling of 2127661597 in words is "two billion, one hundred twenty-seven million, six hundred sixty-one thousand, five hundred ninety-seven".