123345042313 has 4 divisors (see below), whose sum is σ = 124101760528. Its totient is φ = 122588324100.

The previous prime is 123345042241. The next prime is 123345042397. The reversal of 123345042313 is 313240543321.

It is a happy number.

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: 313240543321 = 17 ⋅18425914313.

It is a cyclic number.

It is not a de Polignac number, because 123345042313 - 2²¹ = 123342945161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123345042713) 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, 378358863 + ... + 378359188.

It is an arithmetic number, because the mean of its divisors is an integer number (31025440132).

Almost surely, 2^123345042313 is an apocalyptic number.

It is an amenable number.

123345042313 is a deficient number, since it is larger than the sum of its proper divisors (756718215).

123345042313 is an equidigital number, since it uses as much as digits as its factorization.

123345042313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 756718214.

The product of its (nonzero) digits is 25920, while the sum is 31.

Adding to 123345042313 its reverse (313240543321), we get a palindrome (436585585634).

The spelling of 123345042313 in words is "one hundred twenty-three billion, three hundred forty-five million, forty-two thousand, three hundred thirteen".