Search a number
-
+
389371 = 401971
BaseRepresentation
bin1011111000011111011
3201210010011
41133003323
544424441
612202351
73211123
oct1370373
9653104
10389371
112465a4
121693b7
131082c8
14a1c83
157a581
hex5f0fb

389371 has 4 divisors (see below), whose sum is σ = 390744. Its totient is φ = 388000.

The previous prime is 389369. The next prime is 389381. The reversal of 389371 is 173983.

389371 is nontrivially palindromic in base 7.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 173983 = 199157.

It is a cyclic number.

It is not a de Polignac number, because 389371 - 21 = 389369 is a prime.

It is a super-3 number, since 3×3893713 = 177097349853335433, which contains 333 as substring.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (389381) 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 in 3 ways as a sum of consecutive naturals, for example, 85 + ... + 886.

It is an arithmetic number, because the mean of its divisors is an integer number (97686).

2389371 is an apocalyptic number.

389371 is a deficient number, since it is larger than the sum of its proper divisors (1373).

389371 is an equidigital number, since it uses as much as digits as its factorization.

389371 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1372.

The product of its digits is 4536, while the sum is 31.

The square root of 389371 is about 623.9959935769. The cubic root of 389371 is about 73.0221362780.

It can be divided in two parts, 38 and 9371, that added together give a square (9409 = 972).

The spelling of 389371 in words is "three hundred eighty-nine thousand, three hundred seventy-one".

Divisors: 1 401 971 389371