123213317 has 4 divisors (see below), whose sum is σ = 123524076. Its totient is φ = 122902560.

The previous prime is 123213289. The next prime is 123213401. The reversal of 123213317 is 713312321.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 107205316 + 16008001 = 10354^2 + 4001^2 .

It is a cyclic number.

It is not a de Polignac number, because 123213317 - 2¹⁰ = 123212293 is a prime.

It is a super-4 number, since 4×123213317⁴ (a number of 33 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 123213292 and 123213301.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123213617) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 154784 + ... + 155577.

It is an arithmetic number, because the mean of its divisors is an integer number (30881019).

Almost surely, 2^123213317 is an apocalyptic number.

It is an amenable number.

123213317 is a deficient number, since it is larger than the sum of its proper divisors (310759).

123213317 is an equidigital number, since it uses as much as digits as its factorization.

123213317 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 310758.

The product of its digits is 756, while the sum is 23.

The square root of 123213317 is about 11100.1494134088. The cubic root of 123213317 is about 497.6063148295.

Adding to 123213317 its reverse (713312321), we get a palindrome (836525638).

The spelling of 123213317 in words is "one hundred twenty-three million, two hundred thirteen thousand, three hundred seventeen".