123403321243 has 4 divisors (see below), whose sum is σ = 123421804240. Its totient is φ = 123384838248.

The previous prime is 123403321229. The next prime is 123403321253. The reversal of 123403321243 is 342123304321.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 123403321243 - 2⁵ = 123403321211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123403321253) 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, 9231480 + ... + 9244837.

It is an arithmetic number, because the mean of its divisors is an integer number (30855451060).

Almost surely, 2^123403321243 is an apocalyptic number.

123403321243 is a deficient number, since it is larger than the sum of its proper divisors (18482997).

123403321243 is an equidigital number, since it uses as much as digits as its factorization.

123403321243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18482996.

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

Adding to 123403321243 its reverse (342123304321), we get a palindrome (465526625564).

The spelling of 123403321243 in words is "one hundred twenty-three billion, four hundred three million, three hundred twenty-one thousand, two hundred forty-three".