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30023 = 74289
BaseRepresentation
bin111010101000111
31112011222
413111013
51430043
6350555
7153350
oct72507
945158
1030023
1120614
121545b
1310886
14ad27
158d68
hex7547

30023 has 4 divisors (see below), whose sum is σ = 34320. Its totient is φ = 25728.

The previous prime is 30013. The next prime is 30029. The reversal of 30023 is 32003.

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

It is a cyclic number.

It is not a de Polignac number, because 30023 - 26 = 29959 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30029) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2138 + ... + 2151.

It is an arithmetic number, because the mean of its divisors is an integer number (8580).

230023 is an apocalyptic number.

30023 is a deficient number, since it is larger than the sum of its proper divisors (4297).

30023 is an equidigital number, since it uses as much as digits as its factorization.

30023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4296.

The product of its (nonzero) digits is 18, while the sum is 8.

The square root of 30023 is about 173.2714633170. The cubic root of 30023 is about 31.0802637364.

Adding to 30023 its reverse (32003), we get a palindrome (62026).

It can be divided in two parts, 300 and 23, that added together give a palindrome (323).

The spelling of 30023 in words is "thirty thousand, twenty-three".

Divisors: 1 7 4289 30023