11423143 has 4 divisors (see below), whose sum is σ = 11638728. Its totient is φ = 11207560.

The previous prime is 11423131. The next prime is 11423149. The reversal of 11423143 is 34132411.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34132411 = 43 ⋅793777.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11423143 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 11423143.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11423149) 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, 107713 + ... + 107818.

It is an arithmetic number, because the mean of its divisors is an integer number (2909682).

Almost surely, 2^11423143 is an apocalyptic number.

11423143 is a deficient number, since it is larger than the sum of its proper divisors (215585).

11423143 is an equidigital number, since it uses as much as digits as its factorization.

11423143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 215584.

The product of its digits is 288, while the sum is 19.

The square root of 11423143 is about 3379.8140481393. The cubic root of 11423143 is about 225.2139068630.

Adding to 11423143 its reverse (34132411), we get a palindrome (45555554).

The spelling of 11423143 in words is "eleven million, four hundred twenty-three thousand, one hundred forty-three".