Search a number
-
+
13112789 = 118711047
BaseRepresentation
bin110010000001…
…010111010101
3220200012100212
4302001113111
511324102124
61145015205
7216312464
oct62012725
926605325
1013112789
117446918
124484505
132941661
141a549db
15124040e
hexc815d5

13112789 has 4 divisors (see below), whose sum is σ = 13125024. Its totient is φ = 13100556.

The previous prime is 13112773. The next prime is 13112819. The reversal of 13112789 is 98721131.

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: 98721131 = 195195849.

It is a cyclic number.

It is not a de Polignac number, because 13112789 - 24 = 13112773 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13111789) 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, 4337 + ... + 6710.

It is an arithmetic number, because the mean of its divisors is an integer number (3281256).

Almost surely, 213112789 is an apocalyptic number.

It is an amenable number.

13112789 is a deficient number, since it is larger than the sum of its proper divisors (12235).

13112789 is a wasteful number, since it uses less digits than its factorization.

13112789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12234.

The product of its digits is 3024, while the sum is 32.

The square root of 13112789 is about 3621.1585162762. The cubic root of 13112789 is about 235.8115236053.

The spelling of 13112789 in words is "thirteen million, one hundred twelve thousand, seven hundred eighty-nine".

Divisors: 1 1187 11047 13112789