123513443 has 4 divisors (see below), whose sum is σ = 126526008. Its totient is φ = 120500880.

The previous prime is 123513421. The next prime is 123513451. The reversal of 123513443 is 344315321.

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

It is a cyclic number.

It is not a de Polignac number, because 123513443 - 2¹⁸ = 123251299 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123513493) 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, 1506221 + ... + 1506302.

It is an arithmetic number, because the mean of its divisors is an integer number (31631502).

Almost surely, 2^123513443 is an apocalyptic number.

123513443 is a deficient number, since it is larger than the sum of its proper divisors (3012565).

123513443 is an equidigital number, since it uses as much as digits as its factorization.

123513443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3012564.

The product of its digits is 4320, while the sum is 26.

The square root of 123513443 is about 11113.6601981525. The cubic root of 123513443 is about 498.0100144220.

Adding to 123513443 its reverse (344315321), we get a palindrome (467828764).

The spelling of 123513443 in words is "one hundred twenty-three million, five hundred thirteen thousand, four hundred forty-three".