Base | Representation |
---|---|
bin | 1010000111100… |
… | …1010010001111 |
3 | 2221212011111022 |
4 | 2201321102033 |
5 | 41331033243 |
6 | 4113344355 |
7 | 1023506156 |
oct | 241712217 |
9 | 87764438 |
10 | 42439823 |
11 | 21a57738 |
12 | 122680bb |
13 | 8a3c22a |
14 | 58ca59d |
15 | 3ad4b68 |
hex | 287948f |
42439823 has 2 divisors, whose sum is σ = 42439824. Its totient is φ = 42439822.
The previous prime is 42439783. The next prime is 42439849. The reversal of 42439823 is 32893424.
It is a happy number.
42439823 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.
It is a strong prime.
It is a cyclic number.
It is not a de Polignac number, because 42439823 - 220 = 41391247 is a prime.
It is a super-2 number, since 2×424398232 = 3602277152542658, which contains 22 as substring.
It is a congruent number.
It is not a weakly prime, because it can be changed into another prime (42429823) 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, 21219911 + 21219912.
It is an arithmetic number, because the mean of its divisors is an integer number (21219912).
Almost surely, 242439823 is an apocalyptic number.
42439823 is a deficient number, since it is larger than the sum of its proper divisors (1).
42439823 is an equidigital number, since it uses as much as digits as its factorization.
42439823 is an odious number, because the sum of its binary digits is odd.
The product of its digits is 41472, while the sum is 35.
The square root of 42439823 is about 6514.5854050738. The cubic root of 42439823 is about 348.8118158005.
The spelling of 42439823 in words is "forty-two million, four hundred thirty-nine thousand, eight hundred twenty-three".
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