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287149 is a prime number
BaseRepresentation
bin1000110000110101101
3112120220011
41012012231
533142044
610053221
72304112
oct1060655
9476804
10287149
11186815
1211a211
13a0915
1476909
155a134

287149 has 2 divisors, whose sum is σ = 287150. Its totient is φ = 287148.

The previous prime is 287141. The next prime is 287159. The reversal of 287149 is 941782.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 243049 + 44100 = 493^2 + 210^2 .

It is a cyclic number.

It is not a de Polignac number, because 287149 - 23 = 287141 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 287149.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (287141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 143574 + 143575.

It is an arithmetic number, because the mean of its divisors is an integer number (143575).

2287149 is an apocalyptic number.

It is an amenable number.

287149 is a deficient number, since it is larger than the sum of its proper divisors (1).

287149 is an equidigital number, since it uses as much as digits as its factorization.

287149 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4032, while the sum is 31.

The square root of 287149 is about 535.8628555890. The cubic root of 287149 is about 65.9734358968.

The spelling of 287149 in words is "two hundred eighty-seven thousand, one hundred forty-nine".