1128823 has 2 divisors, whose sum is σ = 1128824. Its totient is φ = 1128822.

The previous prime is 1128821. The next prime is 1128889. The reversal of 1128823 is 3288211.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1128823 - 2¹ = 1128821 is a prime.

It is a super-3 number, since 3×1128823³ = 4315178882204333301, which contains 333 as substring.

Together with 1128821, it forms a pair of twin primes.

It is equal to p₈₇₈₀₂ and since 1128823 and 87802 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1128821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 564411 + 564412.

It is an arithmetic number, because the mean of its divisors is an integer number (564412).

2^1128823 is an apocalyptic number.

1128823 is a deficient number, since it is larger than the sum of its proper divisors (1).

1128823 is an equidigital number, since it uses as much as digits as its factorization.

1128823 is an evil number, because the sum of its binary digits is even.

The product of its digits is 768, while the sum is 25.

The square root of 1128823 is about 1062.4608228071. The cubic root of 1128823 is about 104.1218677405.

It can be divided in two parts, 11288 and 23, that added together give a palindrome (11311).

The spelling of 1128823 in words is "one million, one hundred twenty-eight thousand, eight hundred twenty-three".