Search a number
-
+
30423 = 310141
BaseRepresentation
bin111011011010111
31112201210
413123113
51433143
6352503
7154461
oct73327
945653
1030423
1120948
1215733
1310b03
14b131
159033
hex76d7

30423 has 4 divisors (see below), whose sum is σ = 40568. Its totient is φ = 20280.

The previous prime is 30403. The next prime is 30427. The reversal of 30423 is 32403.

Adding to 30423 its reverse (32403), we get a palindrome (62826).

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 30423 - 25 = 30391 is a prime.

It is a D-number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 30399 and 30408.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 30423.

It is not an unprimeable number, because it can be changed into a prime (30427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5068 + ... + 5073.

It is an arithmetic number, because the mean of its divisors is an integer number (10142).

230423 is an apocalyptic number.

30423 is a deficient number, since it is larger than the sum of its proper divisors (10145).

30423 is a wasteful number, since it uses less digits than its factorization.

30423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10144.

The product of its (nonzero) digits is 72, while the sum is 12.

The square root of 30423 is about 174.4219022944. The cubic root of 30423 is about 31.2176839263.

The spelling of 30423 in words is "thirty thousand, four hundred twenty-three".

Divisors: 1 3 10141 30423