1123423403 has 4 divisors (see below), whose sum is σ = 1124495400. Its totient is φ = 1122351408.

The previous prime is 1123423387. The next prime is 1123423409. The reversal of 1123423403 is 3043243211.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3043243211 = 2579 ⋅1180009.

It is a cyclic number.

It is not a de Polignac number, because 1123423403 - 2⁴ = 1123423387 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1123423409) 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, 534425 + ... + 536522.

It is an arithmetic number, because the mean of its divisors is an integer number (281123850).

Almost surely, 2^1123423403 is an apocalyptic number.

1123423403 is a deficient number, since it is larger than the sum of its proper divisors (1071997).

1123423403 is a wasteful number, since it uses less digits than its factorization.

1123423403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1071996.

The product of its (nonzero) digits is 1728, while the sum is 23.

The square root of 1123423403 is about 33517.5089020649. The cubic root of 1123423403 is about 1039.5558393670. Note that the first 3 decimals are identical.

Adding to 1123423403 its reverse (3043243211), we get a palindrome (4166666614).

The spelling of 1123423403 in words is "one billion, one hundred twenty-three million, four hundred twenty-three thousand, four hundred three".