2127661609 has 2 divisors, whose sum is σ = 2127661610. Its totient is φ = 2127661608.

The previous prime is 2127661597. The next prime is 2127661619. The reversal of 2127661609 is 9061667212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1964971584 + 162690025 = 44328^2 + 12755^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2127661609 is a prime.

It is not a weakly prime, because it can be changed into another prime (2127661619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1063830804 + 1063830805.

It is an arithmetic number, because the mean of its divisors is an integer number (1063830805).

Almost surely, 2^2127661609 is an apocalyptic number.

It is an amenable number.

2127661609 is a deficient number, since it is larger than the sum of its proper divisors (1).

2127661609 is an equidigital number, since it uses as much as digits as its factorization.

2127661609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 54432, while the sum is 40.

The square root of 2127661609 is about 46126.5824552394. The cubic root of 2127661609 is about 1286.1773357915.

The spelling of 2127661609 in words is "two billion, one hundred twenty-seven million, six hundred sixty-one thousand, six hundred nine".