100115173 has 2 divisors, whose sum is σ = 100115174. Its totient is φ = 100115172.

The previous prime is 100115129. The next prime is 100115177. The reversal of 100115173 is 371511001.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 83777409 + 16337764 = 9153^2 + 4042^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-100115173 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 100115173.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (100115177) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50057586 + 50057587.

It is an arithmetic number, because the mean of its divisors is an integer number (50057587).

Almost surely, 2^100115173 is an apocalyptic number.

It is an amenable number.

100115173 is a deficient number, since it is larger than the sum of its proper divisors (1).

100115173 is an equidigital number, since it uses as much as digits as its factorization.

100115173 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 105, while the sum is 19.

The square root of 100115173 is about 10005.7569928517. The cubic root of 100115173 is about 464.3370102310.

Adding to 100115173 its reverse (371511001), we get a palindrome (471626174).

The spelling of 100115173 in words is "one hundred million, one hundred fifteen thousand, one hundred seventy-three".