1123404023 has 4 divisors (see below), whose sum is σ = 1283890320. Its totient is φ = 962917728.

The previous prime is 1123403971. The next prime is 1123404041. The reversal of 1123404023 is 3204043211.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1123404023 - 2³⁰ = 49662199 is a prime.

It is a super-3 number, since 3×1123404023³ (a number of 28 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1123403986 and 1123404004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1123404043) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 80243138 + ... + 80243151.

It is an arithmetic number, because the mean of its divisors is an integer number (320972580).

Almost surely, 2^1123404023 is an apocalyptic number.

1123404023 is a deficient number, since it is larger than the sum of its proper divisors (160486297).

1123404023 is an equidigital number, since it uses as much as digits as its factorization.

1123404023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160486296.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 1123404023 is about 33517.2197981873. The cubic root of 1123404023 is about 1039.5498615947.

Adding to 1123404023 its reverse (3204043211), we get a palindrome (4327447234).

The spelling of 1123404023 in words is "one billion, one hundred twenty-three million, four hundred four thousand, twenty-three".