123423211 has 4 divisors (see below), whose sum is σ = 123456312. Its totient is φ = 123390112.

The previous prime is 123423197. The next prime is 123423227. The reversal of 123423211 is 112324321.

It is a happy number.

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 123423211 - 2²³ = 115034603 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123423271) 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, 10126 + ... + 18691.

It is an arithmetic number, because the mean of its divisors is an integer number (30864078).

Almost surely, 2^123423211 is an apocalyptic number.

123423211 is a deficient number, since it is larger than the sum of its proper divisors (33101).

123423211 is an equidigital number, since it uses as much as digits as its factorization.

123423211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33100.

The product of its digits is 288, while the sum is 19.

The square root of 123423211 is about 11109.5999477929. The cubic root of 123423211 is about 497.8887121420. Note that the first 3 decimals are identical.

Adding to 123423211 its reverse (112324321), we get a palindrome (235747532).

The spelling of 123423211 in words is "one hundred twenty-three million, four hundred twenty-three thousand, two hundred eleven".