100138173 has 4 divisors (see below), whose sum is σ = 133517568. Its totient is φ = 66758780.

The previous prime is 100138141. The next prime is 100138201. The reversal of 100138173 is 371831001.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 371831001 = 3 ⋅123943667.

It is a cyclic number.

It is not a de Polignac number, because 100138173 - 2⁵ = 100138141 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100138123) 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, 16689693 + ... + 16689698.

It is an arithmetic number, because the mean of its divisors is an integer number (33379392).

Almost surely, 2^100138173 is an apocalyptic number.

It is an amenable number.

100138173 is a deficient number, since it is larger than the sum of its proper divisors (33379395).

100138173 is an equidigital number, since it uses as much as digits as its factorization.

100138173 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33379394.

The product of its (nonzero) digits is 504, while the sum is 24.

The square root of 100138173 is about 10006.9062651751. The cubic root of 100138173 is about 464.3725657257.

Adding to 100138173 its reverse (371831001), we get a palindrome (471969174).

The spelling of 100138173 in words is "one hundred million, one hundred thirty-eight thousand, one hundred seventy-three".