100138323 has 4 divisors (see below), whose sum is σ = 133517768. Its totient is φ = 66758880.

The previous prime is 100138321. The next prime is 100138327. The reversal of 100138323 is 323831001.

It is a happy number.

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

It is not a de Polignac number, because 100138323 - 2¹ = 100138321 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 100138323.

It is not an unprimeable number, because it can be changed into a prime (100138321) 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, 16689718 + ... + 16689723.

It is an arithmetic number, because the mean of its divisors is an integer number (33379442).

Almost surely, 2^100138323 is an apocalyptic number.

100138323 is a deficient number, since it is larger than the sum of its proper divisors (33379445).

100138323 is an equidigital number, since it uses as much as digits as its factorization.

100138323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33379444.

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 100138323 is about 10006.9137599961. The cubic root of 100138323 is about 464.3727975915.

Adding to 100138323 its reverse (323831001), we get a palindrome (423969324).

It can be divided in two parts, 10013 and 8323, that added together give a triangular number (18336 = T₁₉₁).

The spelling of 100138323 in words is "one hundred million, one hundred thirty-eight thousand, three hundred twenty-three".