123423444442 has 8 divisors (see below), whose sum is σ = 185138581716. Its totient is φ = 61710583872.

The previous prime is 123423444437. The next prime is 123423444461. The reversal of 123423444442 is 244444324321.

It can be written as a sum of positive squares in 2 ways, for example, as 123061341601 + 362102841 = 350801^2 + 19029^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 426493 + ... + 654784.

Almost surely, 2^123423444442 is an apocalyptic number.

123423444442 is a deficient number, since it is larger than the sum of its proper divisors (61715137274).

123423444442 is a wasteful number, since it uses less digits than its factorization.

123423444442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1138352.

The product of its digits is 294912, while the sum is 37.

Adding to 123423444442 its reverse (244444324321), we get a palindrome (367867768763).

The spelling of 123423444442 in words is "one hundred twenty-three billion, four hundred twenty-three million, four hundred forty-four thousand, four hundred forty-two".