13145728307 has 4 divisors (see below), whose sum is σ = 13153663416. Its totient is φ = 13137793200.

The previous prime is 13145728289. The next prime is 13145728339. The reversal of 13145728307 is 70382754131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 70382754131 = 77141 ⋅912391.

It is a cyclic number.

It is not a de Polignac number, because 13145728307 - 2⁸ = 13145728051 is a prime.

It is a super-2 number, since 2×13145728307² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13145722307) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3965069 + ... + 3968382.

It is an arithmetic number, because the mean of its divisors is an integer number (3288415854).

Almost surely, 2^13145728307 is an apocalyptic number.

13145728307 is a deficient number, since it is larger than the sum of its proper divisors (7935109).

13145728307 is an equidigital number, since it uses as much as digits as its factorization.

13145728307 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7935108.

The product of its (nonzero) digits is 141120, while the sum is 41.

The spelling of 13145728307 in words is "thirteen billion, one hundred forty-five million, seven hundred twenty-eight thousand, three hundred seven".