123243342013 has 4 divisors (see below), whose sum is σ = 134447282208. Its totient is φ = 112039401820.

The previous prime is 123243341983. The next prime is 123243342083. The reversal of 123243342013 is 310243342321.

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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123243342013 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123243342083) 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, 5601970081 + ... + 5601970102.

It is an arithmetic number, because the mean of its divisors is an integer number (33611820552).

Almost surely, 2^123243342013 is an apocalyptic number.

It is an amenable number.

123243342013 is a deficient number, since it is larger than the sum of its proper divisors (11203940195).

123243342013 is a wasteful number, since it uses less digits than its factorization.

123243342013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11203940194.

The product of its (nonzero) digits is 10368, while the sum is 28.

Adding to 123243342013 its reverse (310243342321), we get a palindrome (433486684334).

The spelling of 123243342013 in words is "one hundred twenty-three billion, two hundred forty-three million, three hundred forty-two thousand, thirteen".