123423554351 has 4 divisors (see below), whose sum is σ = 123424303704. Its totient is φ = 123422805000.

The previous prime is 123423554329. The next prime is 123423554381. The reversal of 123423554351 is 153455324321.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123423554351 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 (123423554321) 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, 8000 + ... + 496901.

It is an arithmetic number, because the mean of its divisors is an integer number (30856075926).

Almost surely, 2^123423554351 is an apocalyptic number.

123423554351 is a deficient number, since it is larger than the sum of its proper divisors (749353).

123423554351 is an equidigital number, since it uses as much as digits as its factorization.

123423554351 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 749352.

The product of its digits is 216000, while the sum is 38.

Adding to 123423554351 its reverse (153455324321), we get a palindrome (276878878672).

The spelling of 123423554351 in words is "one hundred twenty-three billion, four hundred twenty-three million, five hundred fifty-four thousand, three hundred fifty-one".