123511343 has 4 divisors (see below), whose sum is σ = 130011960. Its totient is φ = 117010728.

The previous prime is 123511331. The next prime is 123511417. The reversal of 123511343 is 343115321.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 343115321 = 3469 ⋅98909.

It is a cyclic number.

It is not a de Polignac number, because 123511343 - 2¹² = 123507247 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123511043) 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, 3250280 + ... + 3250317.

It is an arithmetic number, because the mean of its divisors is an integer number (32502990).

Almost surely, 2^123511343 is an apocalyptic number.

123511343 is a deficient number, since it is larger than the sum of its proper divisors (6500617).

123511343 is an equidigital number, since it uses as much as digits as its factorization.

123511343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6500616.

The product of its digits is 1080, while the sum is 23.

The square root of 123511343 is about 11113.5657194260. The cubic root of 123511343 is about 498.0071919844.

Adding to 123511343 its reverse (343115321), we get a palindrome (466626664).

The spelling of 123511343 in words is "one hundred twenty-three million, five hundred eleven thousand, three hundred forty-three".