100423 has 4 divisors (see below), whose sum is σ = 101088. Its totient is φ = 99760.

The previous prime is 100417. The next prime is 100447. The reversal of 100423 is 324001.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 324001 = 23 ⋅14087.

It is a cyclic number.

It is not a de Polignac number, because 100423 - 2⁵ = 100391 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 (100403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18 + ... + 448.

It is an arithmetic number, because the mean of its divisors is an integer number (25272).

2¹⁰⁰⁴²³ is an apocalyptic number.

100423 is a deficient number, since it is larger than the sum of its proper divisors (665).

100423 is an equidigital number, since it uses as much as digits as its factorization.

100423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 664.

The product of its (nonzero) digits is 24, while the sum is 10.

The square root of 100423 is about 316.8958819549. The cubic root of 100423 is about 46.4812426755.

Adding to 100423 its reverse (324001), we get a palindrome (424424).

The spelling of 100423 in words is "one hundred thousand, four hundred twenty-three", and thus it is an iban number.