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199143 = 32729109
BaseRepresentation
bin110000100111100111
3101010011200
4300213213
522333033
64133543
71456410
oct604747
9333150
10199143
1112668a
12972b3
136c849
1452807
153e013
hex309e7

199143 has 24 divisors (see below), whose sum is σ = 343200. Its totient is φ = 108864.

The previous prime is 199109. The next prime is 199151. The reversal of 199143 is 341991.

It is not a de Polignac number, because 199143 - 212 = 195047 is a prime.

It is a plaindrome in base 11.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199103) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1773 + ... + 1881.

It is an arithmetic number, because the mean of its divisors is an integer number (14300).

2199143 is an apocalyptic number.

199143 is a deficient number, since it is larger than the sum of its proper divisors (144057).

199143 is a wasteful number, since it uses less digits than its factorization.

199143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151 (or 148 counting only the distinct ones).

The product of its digits is 972, while the sum is 27.

The square root of 199143 is about 446.2544117429. The cubic root of 199143 is about 58.3967057315.

The spelling of 199143 in words is "one hundred ninety-nine thousand, one hundred forty-three".

Divisors: 1 3 7 9 21 29 63 87 109 203 261 327 609 763 981 1827 2289 3161 6867 9483 22127 28449 66381 199143