123312313 has 4 divisors (see below), whose sum is σ = 123376000. Its totient is φ = 123248628.

The previous prime is 123312307. The next prime is 123312331. The reversal of 123312313 is 313213321.

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, and also an emirpimes, since its reverse is a distinct semiprime: 313213321 = 17 ⋅18424313.

It is a cyclic number.

It is not a de Polignac number, because 123312313 - 2⁹ = 123311801 is a prime.

It is a super-4 number, since 4×123312313⁴ (a number of 33 digits) contains 4444 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123312113) 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, 28845 + ... + 32842.

It is an arithmetic number, because the mean of its divisors is an integer number (30844000).

Almost surely, 2^123312313 is an apocalyptic number.

It is an amenable number.

123312313 is a deficient number, since it is larger than the sum of its proper divisors (63687).

123312313 is an equidigital number, since it uses as much as digits as its factorization.

123312313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63686.

The product of its digits is 324, while the sum is 19.

The square root of 123312313 is about 11104.6077373314. The cubic root of 123312313 is about 497.7395467692.

Adding to 123312313 its reverse (313213321), we get a palindrome (436525634).

The spelling of 123312313 in words is "one hundred twenty-three million, three hundred twelve thousand, three hundred thirteen".