13128113 has 4 divisors (see below), whose sum is σ = 13313088. Its totient is φ = 12943140.

The previous prime is 13128103. The next prime is 13128139. The reversal of 13128113 is 31182131.

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, and also an emirpimes, since its reverse is a distinct semiprime: 31182131 = 17 ⋅1834243.

It is a cyclic number.

It is not a de Polignac number, because 13128113 - 2¹⁸ = 12865969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13128103) 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, 92381 + ... + 92522.

It is an arithmetic number, because the mean of its divisors is an integer number (3328272).

Almost surely, 2^13128113 is an apocalyptic number.

It is an amenable number.

13128113 is a deficient number, since it is larger than the sum of its proper divisors (184975).

13128113 is an equidigital number, since it uses as much as digits as its factorization.

13128113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 184974.

The product of its digits is 144, while the sum is 20.

The square root of 13128113 is about 3623.2737958923. The cubic root of 13128113 is about 235.9033466608.

The spelling of 13128113 in words is "thirteen million, one hundred twenty-eight thousand, one hundred thirteen".