Search a number
-
+
7117091 = 22931079
BaseRepresentation
bin11011001001100100100011
3111101120210222
4123021210203
53310221331
6412313255
7114331352
oct33114443
914346728
107117091
1140211a3
12247282b
1316225c7
14d33999
15958b7b
hex6c9923

7117091 has 4 divisors (see below), whose sum is σ = 7148400. Its totient is φ = 7085784.

The previous prime is 7117087. The next prime is 7117109. The reversal of 7117091 is 1907117.

Adding to 7117091 its sum of digits (26), we get a palindrome (7117117).

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1907117 = 9719661.

It is a cyclic number.

It is not a de Polignac number, because 7117091 - 22 = 7117087 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 7117091.

It is not an unprimeable number, because it can be changed into a prime (7117021) 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, 15311 + ... + 15768.

It is an arithmetic number, because the mean of its divisors is an integer number (1787100).

Almost surely, 27117091 is an apocalyptic number.

7117091 is a deficient number, since it is larger than the sum of its proper divisors (31309).

7117091 is a wasteful number, since it uses less digits than its factorization.

7117091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31308.

The product of its (nonzero) digits is 441, while the sum is 26.

The square root of 7117091 is about 2667.7876602159. The cubic root of 7117091 is about 192.3538306814.

The spelling of 7117091 in words is "seven million, one hundred seventeen thousand, ninety-one".

Divisors: 1 229 31079 7117091