13128907 has 4 divisors (see below), whose sum is σ = 14322456. Its totient is φ = 11935360.

The previous prime is 13128901. The next prime is 13128917. The reversal of 13128907 is 70982131.

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 13128907 - 2²³ = 4740299 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13128901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 596758 + ... + 596779.

It is an arithmetic number, because the mean of its divisors is an integer number (3580614).

Almost surely, 2^13128907 is an apocalyptic number.

13128907 is a deficient number, since it is larger than the sum of its proper divisors (1193549).

13128907 is a wasteful number, since it uses less digits than its factorization.

13128907 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1193548.

The product of its (nonzero) digits is 3024, while the sum is 31.

The square root of 13128907 is about 3623.3833636534. The cubic root of 13128907 is about 235.9081024466.

The spelling of 13128907 in words is "thirteen million, one hundred twenty-eight thousand, nine hundred seven".