123642313 has 4 divisors (see below), whose sum is σ = 123705808. Its totient is φ = 123578820.

The previous prime is 123642301. The next prime is 123642317. The reversal of 123642313 is 313246321.

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: 313246321 = 467 ⋅670763.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123642313 is a prime.

It is a super-3 number, since 3×123642313³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123642317) 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, 28731 + ... + 32752.

It is an arithmetic number, because the mean of its divisors is an integer number (30926452).

Almost surely, 2^123642313 is an apocalyptic number.

It is an amenable number.

123642313 is a deficient number, since it is larger than the sum of its proper divisors (63495).

123642313 is an equidigital number, since it uses as much as digits as its factorization.

123642313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63494.

The product of its digits is 2592, while the sum is 25.

The square root of 123642313 is about 11119.4565065025. The cubic root of 123642313 is about 498.1831568248.

Adding to 123642313 its reverse (313246321), we get a palindrome (436888634).

The spelling of 123642313 in words is "one hundred twenty-three million, six hundred forty-two thousand, three hundred thirteen".