1233423543 has 12 divisors (see below), whose sum is σ = 1807662584. Its totient is φ = 747529200.

The previous prime is 1233423539. The next prime is 1233423547. The reversal of 1233423543 is 3453243321.

It is an interprime number because it is at equal distance from previous prime (1233423539) and next prime (1233423547).

It is not a de Polignac number, because 1233423543 - 2² = 1233423539 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1233423543.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1233423547) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1698568 + ... + 1699293.

Almost surely, 2^1233423543 is an apocalyptic number.

1233423543 is a deficient number, since it is larger than the sum of its proper divisors (574239041).

1233423543 is a wasteful number, since it uses less digits than its factorization.

1233423543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3397886 (or 3397875 counting only the distinct ones).

The product of its digits is 25920, while the sum is 30.

The square root of 1233423543 is about 35120.1301677542. The cubic root of 1233423543 is about 1072.4344207107.

Adding to 1233423543 its reverse (3453243321), we get a palindrome (4686666864).

The spelling of 1233423543 in words is "one billion, two hundred thirty-three million, four hundred twenty-three thousand, five hundred forty-three".