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19147 = 41467
BaseRepresentation
bin100101011001011
3222021011
410223023
51103042
6224351
7106552
oct45313
928234
1019147
1113427
12b0b7
13893b
146d99
155a17
hex4acb

19147 has 4 divisors (see below), whose sum is σ = 19656. Its totient is φ = 18640.

The previous prime is 19141. The next prime is 19157. The reversal of 19147 is 74191.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 19147 - 23 = 19139 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19141) 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, 193 + ... + 274.

It is an arithmetic number, because the mean of its divisors is an integer number (4914).

219147 is an apocalyptic number.

19147 is a deficient number, since it is larger than the sum of its proper divisors (509).

19147 is an equidigital number, since it uses as much as digits as its factorization.

19147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 508.

The product of its digits is 252, while the sum is 22.

The square root of 19147 is about 138.3726851658. The cubic root of 19147 is about 26.7526564457.

The spelling of 19147 in words is "nineteen thousand, one hundred forty-seven".

Divisors: 1 41 467 19147