100117172 has 6 divisors (see below), whose sum is σ = 175205058. Its totient is φ = 50058584.

The previous prime is 100117163. The next prime is 100117187. The reversal of 100117172 is 271711001.

It can be written as a sum of positive squares in only one way, i.e., 87684496 + 12432676 = 9364^2 + 3526^2 .

It is a congruent number.

It is an unprimeable number.

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, 12514643 + ... + 12514650.

It is an arithmetic number, because the mean of its divisors is an integer number (29200843).

Almost surely, 2^100117172 is an apocalyptic number.

It is an amenable number.

100117172 is a deficient number, since it is larger than the sum of its proper divisors (75087886).

100117172 is a wasteful number, since it uses less digits than its factorization.

100117172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25029297 (or 25029295 counting only the distinct ones).

The product of its (nonzero) digits is 98, while the sum is 20.

The square root of 100117172 is about 10005.8568848450. The cubic root of 100117172 is about 464.3401006833.

Adding to 100117172 its reverse (271711001), we get a palindrome (371828173).

The spelling of 100117172 in words is "one hundred million, one hundred seventeen thousand, one hundred seventy-two".