13123043434 has 8 divisors (see below), whose sum is σ = 19686884868. Its totient is φ = 6560748480.

The previous prime is 13123043419. The next prime is 13123043441. The reversal of 13123043434 is 43434032131.

It can be written as a sum of positive squares in 2 ways, for example, as 7665527809 + 5457515625 = 87553^2 + 73875^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 365167 + ... + 399490.

Almost surely, 2^13123043434 is an apocalyptic number.

13123043434 is a deficient number, since it is larger than the sum of its proper divisors (6563841434).

13123043434 is an equidigital number, since it uses as much as digits as its factorization.

13123043434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 773240.

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

Adding to 13123043434 its reverse (43434032131), we get a palindrome (56557075565).

The spelling of 13123043434 in words is "thirteen billion, one hundred twenty-three million, forty-three thousand, four hundred thirty-four".