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388081 is a prime number
BaseRepresentation
bin1011110101111110001
3201201100101
41132233301
544404311
612152401
73204301
oct1365761
9651311
10388081
11245631
12168701
13107845
14a1601
1579ec1
hex5ebf1

388081 has 2 divisors, whose sum is σ = 388082. Its totient is φ = 388080.

The previous prime is 388067. The next prime is 388099. The reversal of 388081 is 180883.

It can be divided in two parts, 38808 and 1, that added together give a square (38809 = 1972).

388081 = 4402 + 4412.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 194481 + 193600 = 441^2 + 440^2 .

It is an emirp because it is prime and its reverse (180883) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 388081 - 27 = 387953 is a prime.

It is a super-2 number, since 2×3880812 = 301213725122, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (388051) 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, 194040 + 194041.

It is an arithmetic number, because the mean of its divisors is an integer number (194041).

2388081 is an apocalyptic number.

388081 is the 441-st centered square number.

It is an amenable number.

388081 is a deficient number, since it is larger than the sum of its proper divisors (1).

388081 is an equidigital number, since it uses as much as digits as its factorization.

388081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1536, while the sum is 28.

The square root of 388081 is about 622.9614755344. The cubic root of 388081 is about 72.9414054108.

The spelling of 388081 in words is "three hundred eighty-eight thousand, eighty-one".