13128108247 has 4 divisors (see below), whose sum is σ = 13128757200. Its totient is φ = 13127459296.

The previous prime is 13128108239. The next prime is 13128108263. The reversal of 13128108247 is 74280182131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 74280182131 = 929 ⋅79957139.

It is a cyclic number.

It is not a de Polignac number, because 13128108247 - 2³ = 13128108239 is a prime.

It is a super-2 number, since 2×13128108247² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13128108547) 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, 293122 + ... + 334927.

It is an arithmetic number, because the mean of its divisors is an integer number (3282189300).

Almost surely, 2^13128108247 is an apocalyptic number.

13128108247 is a deficient number, since it is larger than the sum of its proper divisors (648953).

13128108247 is an equidigital number, since it uses as much as digits as its factorization.

13128108247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 648952.

The product of its (nonzero) digits is 21504, while the sum is 37.

The spelling of 13128108247 in words is "thirteen billion, one hundred twenty-eight million, one hundred eight thousand, two hundred forty-seven".