1123279823 has 8 divisors (see below), whose sum is σ = 1199498880. Its totient is φ = 1049559840.

The previous prime is 1123279813. The next prime is 1123279847. The reversal of 1123279823 is 3289723211.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1123279823 - 2¹⁰ = 1123278799 is a prime.

It is a super-2 number, since 2×1123279823² = 2523515121517822658, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1123279813) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 623840 + ... + 625637.

It is an arithmetic number, because the mean of its divisors is an integer number (149937360).

Almost surely, 2^1123279823 is an apocalyptic number.

1123279823 is a deficient number, since it is larger than the sum of its proper divisors (76219057).

1123279823 is a wasteful number, since it uses less digits than its factorization.

1123279823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1249537.

The product of its digits is 36288, while the sum is 38.

The square root of 1123279823 is about 33515.3669680044. The cubic root of 1123279823 is about 1039.5115503999.

The spelling of 1123279823 in words is "one billion, one hundred twenty-three million, two hundred seventy-nine thousand, eight hundred twenty-three".