2128530379 has 2 divisors, whose sum is σ = 2128530380. Its totient is φ = 2128530378.

The previous prime is 2128530361. The next prime is 2128530493. The reversal of 2128530379 is 9730358212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2128530379 - 2⁹ = 2128529867 is a prime.

It is not a weakly prime, because it can be changed into another prime (2128530179) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1064265189 + 1064265190.

It is an arithmetic number, because the mean of its divisors is an integer number (1064265190).

Almost surely, 2^2128530379 is an apocalyptic number.

2128530379 is a deficient number, since it is larger than the sum of its proper divisors (1).

2128530379 is an equidigital number, since it uses as much as digits as its factorization.

2128530379 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 90720, while the sum is 40.

The square root of 2128530379 is about 46135.9987320097. The cubic root of 2128530379 is about 1286.3523699274.

The spelling of 2128530379 in words is "two billion, one hundred twenty-eight million, five hundred thirty thousand, three hundred seventy-nine".