123642223 has 4 divisors (see below), whose sum is σ = 123669160. Its totient is φ = 123615288.

The previous prime is 123642203. The next prime is 123642251. The reversal of 123642223 is 322246321.

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 123642223 - 2¹³ = 123634031 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 (123642203) 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 in 3 ways as a sum of consecutive naturals, for example, 4665 + ... + 16402.

It is an arithmetic number, because the mean of its divisors is an integer number (30917290).

Almost surely, 2^123642223 is an apocalyptic number.

123642223 is a deficient number, since it is larger than the sum of its proper divisors (26937).

123642223 is an equidigital number, since it uses as much as digits as its factorization.

123642223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26936.

The product of its digits is 3456, while the sum is 25.

The square root of 123642223 is about 11119.4524595413. The cubic root of 123642223 is about 498.1830359479.

Adding to 123642223 its reverse (322246321), we get a palindrome (445888544).

The spelling of 123642223 in words is "one hundred twenty-three million, six hundred forty-two thousand, two hundred twenty-three".