100023 has 16 divisors (see below), whose sum is σ = 166656. Its totient is φ = 51840.

The previous prime is 100019. The next prime is 100043. The reversal of 100023 is 320001.

It is not a de Polignac number, because 100023 - 2² = 100019 is a prime.

100023 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 99984 and 100020.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100003) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15 + ... + 447.

It is an arithmetic number, because the mean of its divisors is an integer number (10416).

2¹⁰⁰⁰²³ is an apocalyptic number.

100023 is a deficient number, since it is larger than the sum of its proper divisors (66633).

100023 is a wasteful number, since it uses less digits than its factorization.

100023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 454.

The product of its (nonzero) digits is 6, while the sum is 6.

The square root of 100023 is about 316.2641301191. The cubic root of 100023 is about 46.4194466148.

Adding to 100023 its reverse (320001), we get a palindrome (420024).

The spelling of 100023 in words is "one hundred thousand, twenty-three", and thus it is an iban number.