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13202197 = 28574621
BaseRepresentation
bin110010010111…
…001100010101
3220211202000021
4302113030111
511334432242
61150545141
7220134241
oct62271425
926752007
1013202197
1174a8008
1245081b1
132973268
141a79421
15125bb67
hexc97315

13202197 has 4 divisors (see below), whose sum is σ = 13209676. Its totient is φ = 13194720.

The previous prime is 13202179. The next prime is 13202213. The reversal of 13202197 is 79120231.

13202197 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 79120231 = 491161141.

It can be written as a sum of positive squares in 2 ways, for example, as 6922161 + 6280036 = 2631^2 + 2506^2 .

It is a cyclic number.

It is not a de Polignac number, because 13202197 - 219 = 12677909 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13202107) 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, 547 + ... + 5167.

It is an arithmetic number, because the mean of its divisors is an integer number (3302419).

Almost surely, 213202197 is an apocalyptic number.

It is an amenable number.

13202197 is a deficient number, since it is larger than the sum of its proper divisors (7479).

13202197 is an equidigital number, since it uses as much as digits as its factorization.

13202197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7478.

The product of its (nonzero) digits is 756, while the sum is 25.

The square root of 13202197 is about 3633.4827645112. The cubic root of 13202197 is about 236.3462610816.

The spelling of 13202197 in words is "thirteen million, two hundred two thousand, one hundred ninety-seven".

Divisors: 1 2857 4621 13202197