123843442 has 4 divisors (see below), whose sum is σ = 185765166. Its totient is φ = 61921720.

The previous prime is 123843437. The next prime is 123843443. The reversal of 123843442 is 244348321.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 107931321 + 15912121 = 10389^2 + 3989^2 .

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (123843443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30960859 + ... + 30960862.

Almost surely, 2^123843442 is an apocalyptic number.

123843442 is a deficient number, since it is larger than the sum of its proper divisors (61921724).

123843442 is an equidigital number, since it uses as much as digits as its factorization.

123843442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61921723.

The product of its digits is 18432, while the sum is 31.

The square root of 123843442 is about 11128.4968436892. The cubic root of 123843442 is about 498.4531420627.

The spelling of 123843442 in words is "one hundred twenty-three million, eight hundred forty-three thousand, four hundred forty-two".