100123423 has 2 divisors, whose sum is σ = 100123424. Its totient is φ = 100123422.

The previous prime is 100123417. The next prime is 100123433. The reversal of 100123423 is 324321001.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 100123423 - 2¹³ = 100115231 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 100123397 and 100123406.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (100123403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50061711 + 50061712.

It is an arithmetic number, because the mean of its divisors is an integer number (50061712).

Almost surely, 2^100123423 is an apocalyptic number.

100123423 is a deficient number, since it is larger than the sum of its proper divisors (1).

100123423 is an equidigital number, since it uses as much as digits as its factorization.

100123423 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 100123423 is about 10006.1692470196. The cubic root of 100123423 is about 464.3497644586.

Adding to 100123423 its reverse (324321001), we get a palindrome (424444424).

The spelling of 100123423 in words is "one hundred million, one hundred twenty-three thousand, four hundred twenty-three".