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23423 = 59397
BaseRepresentation
bin101101101111111
31012010112
411231333
51222143
6300235
7125201
oct55577
935115
1023423
1116664
121167b
13a87a
148771
156e18
hex5b7f

23423 has 4 divisors (see below), whose sum is σ = 23880. Its totient is φ = 22968.

The previous prime is 23417. The next prime is 23431. The reversal of 23423 is 32432.

Subtracting from 23423 its sum of digits (14), we obtain a square (23409 = 1532).

Adding to 23423 its reverse (32432), we get a palindrome (55855).

Subtracting 23423 from its reverse (32432), we obtain a palindrome (9009).

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 23423 - 28 = 23167 is a prime.

It is a Duffinian number.

It is a plaindrome in base 8 and base 12.

It is a nialpdrome in base 14.

It is a zygodrome in base 8.

It is a junction number, because it is equal to n+sod(n) for n = 23398 and 23407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23473) 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, 140 + ... + 257.

It is an arithmetic number, because the mean of its divisors is an integer number (5970).

223423 is an apocalyptic number.

23423 is a deficient number, since it is larger than the sum of its proper divisors (457).

23423 is an equidigital number, since it uses as much as digits as its factorization.

23423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 456.

The product of its digits is 144, while the sum is 14.

The square root of 23423 is about 153.0457447955. The cubic root of 23423 is about 28.6119532085.

The spelling of 23423 in words is "twenty-three thousand, four hundred twenty-three", and thus it is an iban number.

Divisors: 1 59 397 23423