2127879421 has 2 divisors, whose sum is σ = 2127879422. Its totient is φ = 2127879420.

The previous prime is 2127879353. The next prime is 2127879433. The reversal of 2127879421 is 1249787212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2065248025 + 62631396 = 45445^2 + 7914^2 .

It is a cyclic number.

It is not a de Polignac number, because 2127879421 - 2²⁷ = 1993661693 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2127879451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1063939710 + 1063939711.

It is an arithmetic number, because the mean of its divisors is an integer number (1063939711).

Almost surely, 2^2127879421 is an apocalyptic number.

It is an amenable number.

2127879421 is a deficient number, since it is larger than the sum of its proper divisors (1).

2127879421 is an equidigital number, since it uses as much as digits as its factorization.

2127879421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 112896, while the sum is 43.

The square root of 2127879421 is about 46128.9434195062. The cubic root of 2127879421 is about 1286.2212236130.

The spelling of 2127879421 in words is "two billion, one hundred twenty-seven million, eight hundred seventy-nine thousand, four hundred twenty-one".