Search a number
-
+
1384813 is a prime number
BaseRepresentation
bin101010010000101101101
32121100121101
411102011231
5323303223
645403101
714525233
oct5220555
92540541
101384813
11866481
12569491
13396421
14280953
151c54ad
hex15216d

1384813 has 2 divisors, whose sum is σ = 1384814. Its totient is φ = 1384812.

The previous prime is 1384787. The next prime is 1384829. The reversal of 1384813 is 3184831.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1283689 + 101124 = 1133^2 + 318^2 .

It is a cyclic number.

It is not a de Polignac number, because 1384813 - 25 = 1384781 is a prime.

It is an Ulam number.

1384813 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1384843) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 692406 + 692407.

It is an arithmetic number, because the mean of its divisors is an integer number (692407).

21384813 is an apocalyptic number.

It is an amenable number.

1384813 is a deficient number, since it is larger than the sum of its proper divisors (1).

1384813 is an equidigital number, since it uses as much as digits as its factorization.

1384813 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2304, while the sum is 28.

The square root of 1384813 is about 1176.7807782251. The cubic root of 1384813 is about 111.4629100362.

It can be divided in two parts, 13848 and 13, that added together give a triangular number (13861 = T166).

The spelling of 1384813 in words is "one million, three hundred eighty-four thousand, eight hundred thirteen".