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388813 is a prime number
BaseRepresentation
bin1011110111011001101
3201202100111
41132323031
544420223
612200021
73206365
oct1367315
9652314
10388813
11246137
12169011
13107c89
14a19a5
157a30d
hex5eecd

388813 has 2 divisors, whose sum is σ = 388814. Its totient is φ = 388812.

The previous prime is 388793. The next prime is 388823. The reversal of 388813 is 318883.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 381924 + 6889 = 618^2 + 83^2 .

It is an emirp because it is prime and its reverse (318883) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 388813 - 25 = 388781 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (388823) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 194406 + 194407.

It is an arithmetic number, because the mean of its divisors is an integer number (194407).

2388813 is an apocalyptic number.

It is an amenable number.

388813 is a deficient number, since it is larger than the sum of its proper divisors (1).

388813 is an equidigital number, since it uses as much as digits as its factorization.

388813 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4608, while the sum is 31.

The square root of 388813 is about 623.5487150175. The cubic root of 388813 is about 72.9872374010.

The spelling of 388813 in words is "three hundred eighty-eight thousand, eight hundred thirteen".