Search a number
-
+
7129217 is a prime number
BaseRepresentation
bin11011001100100010000001
3111102012110002
4123030202001
53311113332
6412445345
7114411614
oct33144201
914365402
107129217
11402a317
122479855
131627c94
14d3817b
1595c562
hex6cc881

7129217 has 2 divisors, whose sum is σ = 7129218. Its totient is φ = 7129216.

The previous prime is 7129211. The next prime is 7129219.

7129217 is nontrivially palindromic in base 10.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6370576 + 758641 = 2524^2 + 871^2 .

It is a palprime.

It is a cyclic number.

It is not a de Polignac number, because 7129217 - 210 = 7128193 is a prime.

Together with 7129219, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 7129217.

It is not a weakly prime, because it can be changed into another prime (7129211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3564608 + 3564609.

It is an arithmetic number, because the mean of its divisors is an integer number (3564609).

Almost surely, 27129217 is an apocalyptic number.

It is an amenable number.

7129217 is a deficient number, since it is larger than the sum of its proper divisors (1).

7129217 is an equidigital number, since it uses as much as digits as its factorization.

7129217 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1764, while the sum is 29.

The square root of 7129217 is about 2670.0593626360. The cubic root of 7129217 is about 192.4630119522.

The spelling of 7129217 in words is "seven million, one hundred twenty-nine thousand, two hundred seventeen".