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11123509 is a prime number
BaseRepresentation
bin101010011011…
…101100110101
3202221010120211
4222123230311
510321423014
61034225421
7163356025
oct52335465
922833524
1011123509
116308291
123885271
1323c6077
141697a85
15e9acc4
hexa9bb35

11123509 has 2 divisors, whose sum is σ = 11123510. Its totient is φ = 11123508.

The previous prime is 11123507. The next prime is 11123527. The reversal of 11123509 is 90532111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10745284 + 378225 = 3278^2 + 615^2 .

It is a cyclic number.

It is not a de Polignac number, because 11123509 - 21 = 11123507 is a prime.

Together with 11123507, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 11123509.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11123507) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5561754 + 5561755.

It is an arithmetic number, because the mean of its divisors is an integer number (5561755).

Almost surely, 211123509 is an apocalyptic number.

It is an amenable number.

11123509 is a deficient number, since it is larger than the sum of its proper divisors (1).

11123509 is an equidigital number, since it uses as much as digits as its factorization.

11123509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 270, while the sum is 22.

The square root of 11123509 is about 3335.1924981926. The cubic root of 11123509 is about 223.2272813974.

The spelling of 11123509 in words is "eleven million, one hundred twenty-three thousand, five hundred nine".