2128279 has 2 divisors, whose sum is σ = 2128280. Its totient is φ = 2128278.

The previous prime is 2128267. The next prime is 2128283. The reversal of 2128279 is 9728212.

2128279 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2128279 is a prime.

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 2128279.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2123279) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1064139 + 1064140.

It is an arithmetic number, because the mean of its divisors is an integer number (1064140).

2^2128279 is an apocalyptic number.

2128279 is a deficient number, since it is larger than the sum of its proper divisors (1).

2128279 is an equidigital number, since it uses as much as digits as its factorization.

2128279 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4032, while the sum is 31.

The square root of 2128279 is about 1458.8622279023. The cubic root of 2128279 is about 128.6301728617.

The spelling of 2128279 in words is "two million, one hundred twenty-eight thousand, two hundred seventy-nine".