123240223 has 2 divisors, whose sum is σ = 123240224. Its totient is φ = 123240222.

The previous prime is 123240217. The next prime is 123240239. The reversal of 123240223 is 322042321.

It is a weak prime.

It is an emirp because it is prime and its reverse (322042321) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123240223 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 123240223.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123240253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61620111 + 61620112.

It is an arithmetic number, because the mean of its divisors is an integer number (61620112).

Almost surely, 2^123240223 is an apocalyptic number.

123240223 is a deficient number, since it is larger than the sum of its proper divisors (1).

123240223 is an equidigital number, since it uses as much as digits as its factorization.

123240223 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 123240223 is about 11101.3613129201. The cubic root of 123240223 is about 497.6425328331.

Adding to 123240223 its reverse (322042321), we get a palindrome (445282544).

The spelling of 123240223 in words is "one hundred twenty-three million, two hundred forty thousand, two hundred twenty-three".