123340340143 has 4 divisors (see below), whose sum is σ = 123357508920. Its totient is φ = 123323171368.

The previous prime is 123340340117. The next prime is 123340340161. The reversal of 123340340143 is 341043043321.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123340340143 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 (123340340843) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8573608 + ... + 8587981.

It is an arithmetic number, because the mean of its divisors is an integer number (30839377230).

Almost surely, 2^123340340143 is an apocalyptic number.

123340340143 is a deficient number, since it is larger than the sum of its proper divisors (17168777).

123340340143 is an equidigital number, since it uses as much as digits as its factorization.

123340340143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17168776.

The product of its (nonzero) digits is 10368, while the sum is 28.

Adding to 123340340143 its reverse (341043043321), we get a palindrome (464383383464).

The spelling of 123340340143 in words is "one hundred twenty-three billion, three hundred forty million, three hundred forty thousand, one hundred forty-three".