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19087 is a prime number
BaseRepresentation
bin100101010001111
3222011221
410222033
51102322
6224211
7106435
oct45217
928157
1019087
1113382
12b067
1388c3
146d55
1559c7
hex4a8f

19087 has 2 divisors, whose sum is σ = 19088. Its totient is φ = 19086.

The previous prime is 19081. The next prime is 19121. The reversal of 19087 is 78091.

Adding to 19087 its product of nonzero digits (504), we get a palindrome (19591).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 19087 - 23 = 19079 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9543 + 9544.

It is an arithmetic number, because the mean of its divisors is an integer number (9544).

219087 is an apocalyptic number.

19087 is a deficient number, since it is larger than the sum of its proper divisors (1).

19087 is an equidigital number, since it uses as much as digits as its factorization.

19087 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 504, while the sum is 25.

The square root of 19087 is about 138.1557092559. The cubic root of 19087 is about 26.7246827164.

The spelling of 19087 in words is "nineteen thousand, eighty-seven".