2127661699 has 2 divisors, whose sum is σ = 2127661700. Its totient is φ = 2127661698.

The previous prime is 2127661681. The next prime is 2127661747. The reversal of 2127661699 is 9961667212.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2127661699 - 2⁹ = 2127661187 is a prime.

It is not a weakly prime, because it can be changed into another prime (2127661609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1063830849 + 1063830850.

It is an arithmetic number, because the mean of its divisors is an integer number (1063830850).

Almost surely, 2^2127661699 is an apocalyptic number.

2127661699 is a deficient number, since it is larger than the sum of its proper divisors (1).

2127661699 is an equidigital number, since it uses as much as digits as its factorization.

2127661699 is an evil number, because the sum of its binary digits is even.

The product of its digits is 489888, while the sum is 49.

The square root of 2127661699 is about 46126.5834308157. The cubic root of 2127661699 is about 1286.1773539266.

The spelling of 2127661699 in words is "two billion, one hundred twenty-seven million, six hundred sixty-one thousand, six hundred ninety-nine".