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389071 = 2291699
BaseRepresentation
bin1011110111111001111
3201202201001
41132333033
544422241
612201131
73210214
oct1367717
9652631
10389071
11246351
121691a7
13108127
14a1b0b
157a431
hex5efcf

389071 has 4 divisors (see below), whose sum is σ = 391000. Its totient is φ = 387144.

The previous prime is 389057. The next prime is 389083. The reversal of 389071 is 170983.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 170983 = 612803.

It is a cyclic number.

It is not a de Polignac number, because 389071 - 213 = 380879 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (389041) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 621 + ... + 1078.

It is an arithmetic number, because the mean of its divisors is an integer number (97750).

2389071 is an apocalyptic number.

389071 is a deficient number, since it is larger than the sum of its proper divisors (1929).

389071 is a wasteful number, since it uses less digits than its factorization.

389071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1928.

The product of its (nonzero) digits is 1512, while the sum is 28.

The square root of 389071 is about 623.7555610975. The cubic root of 389071 is about 73.0033775881.

The spelling of 389071 in words is "three hundred eighty-nine thousand, seventy-one".

Divisors: 1 229 1699 389071