123005213 has 4 divisors (see below), whose sum is σ = 123106368. Its totient is φ = 122904060.

The previous prime is 123005191. The next prime is 123005237. The reversal of 123005213 is 312500321.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123005213 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 123005191 and 123005200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123005243) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 48731 + ... + 51192.

It is an arithmetic number, because the mean of its divisors is an integer number (30776592).

Almost surely, 2^123005213 is an apocalyptic number.

It is an amenable number.

123005213 is a deficient number, since it is larger than the sum of its proper divisors (101155).

123005213 is an equidigital number, since it uses as much as digits as its factorization.

123005213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101154.

The product of its (nonzero) digits is 180, while the sum is 17.

The square root of 123005213 is about 11090.7715241096. The cubic root of 123005213 is about 497.3260090375.

Adding to 123005213 its reverse (312500321), we get a palindrome (435505534).

The spelling of 123005213 in words is "one hundred twenty-three million, five thousand, two hundred thirteen".