123633442 has 4 divisors (see below), whose sum is σ = 185450166. Its totient is φ = 61816720.

The previous prime is 123633431. The next prime is 123633449. The reversal of 123633442 is 244336321.

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., 116445681 + 7187761 = 10791^2 + 2681^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 123633442.

It is not an unprimeable number, because it can be changed into a prime (123633449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30908359 + ... + 30908362.

Almost surely, 2^123633442 is an apocalyptic number.

123633442 is a deficient number, since it is larger than the sum of its proper divisors (61816724).

123633442 is an equidigital number, since it uses as much as digits as its factorization.

123633442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61816723.

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

The square root of 123633442 is about 11119.0576039519. The cubic root of 123633442 is about 498.1712421105.

Adding to 123633442 its reverse (244336321), we get a palindrome (367969763).

The spelling of 123633442 in words is "one hundred twenty-three million, six hundred thirty-three thousand, four hundred forty-two".