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1443 = 31337
BaseRepresentation
bin10110100011
31222110
4112203
521233
610403
74131
oct2643
91873
101443
1110a2
12a03
13870
14751
15663
hex5a3

1443 has 8 divisors (see below), whose sum is σ = 2128. Its totient is φ = 864.

The previous prime is 1439. The next prime is 1447. The reversal of 1443 is 3441.

It is a Cunningham number, because it is equal to 382-1.

It is an interprime number because it is at equal distance from previous prime (1439) and next prime (1447).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1443 - 22 = 1439 is a prime.

It is a D-number.

It is a Duffinian number.

It is a nialpdrome in base 13, base 14 and base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1447) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21 + ... + 57.

It is an arithmetic number, because the mean of its divisors is an integer number (266).

1443 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1443 is a deficient number, since it is larger than the sum of its proper divisors (685).

1443 is a wasteful number, since it uses less digits than its factorization.

1443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53.

The product of its digits is 48, while the sum is 12.

The square root of 1443 is about 37.9868398264. The cubic root of 1443 is about 11.3002688740.

Subtracting from 1443 its sum of digits (12), we obtain a triangular number (1431 = T53).

Adding to 1443 its reverse (3441), we get a palindrome (4884).

It can be divided in two parts, 1 and 443, that added together give a palindrome (444).

The spelling of 1443 in words is "one thousand, four hundred forty-three", and thus it is an iban number.

Divisors: 1 3 13 37 39 111 481 1443