123071302543 has 4 divisors (see below), whose sum is σ = 140652917200. Its totient is φ = 105489687888.

The previous prime is 123071302513. The next prime is 123071302553. The reversal of 123071302543 is 345203170321.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 345203170321 = 1361 ⋅253639361.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123071302543 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 (123071302513) 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, 8790807318 + ... + 8790807331.

It is an arithmetic number, because the mean of its divisors is an integer number (35163229300).

Almost surely, 2^123071302543 is an apocalyptic number.

123071302543 is a deficient number, since it is larger than the sum of its proper divisors (17581614657).

123071302543 is an equidigital number, since it uses as much as digits as its factorization.

123071302543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17581614656.

The product of its (nonzero) digits is 15120, while the sum is 31.

Adding to 123071302543 its reverse (345203170321), we get a palindrome (468274472864).

The spelling of 123071302543 in words is "one hundred twenty-three billion, seventy-one million, three hundred two thousand, five hundred forty-three".