2128823 has 2 divisors, whose sum is σ = 2128824. Its totient is φ = 2128822.

The previous prime is 2128799. The next prime is 2128831. The reversal of 2128823 is 3288212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2128823 - 2¹⁸ = 1866679 is a prime.

It is a super-3 number, since 3×2128823³ = 28942758170165333301, which contains 333 as substring.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 2128792 and 2128801.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2128873) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1064411 + 1064412.

It is an arithmetic number, because the mean of its divisors is an integer number (1064412).

2^2128823 is an apocalyptic number.

2128823 is a deficient number, since it is larger than the sum of its proper divisors (1).

2128823 is an equidigital number, since it uses as much as digits as its factorization.

2128823 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1536, while the sum is 26.

The square root of 2128823 is about 1459.0486626566. The cubic root of 2128823 is about 128.6411314583.

The spelling of 2128823 in words is "two million, one hundred twenty-eight thousand, eight hundred twenty-three".