100919172 has 12 divisors (see below), whose sum is σ = 235478096. Its totient is φ = 33639720.

The previous prime is 100919141. The next prime is 100919177. The reversal of 100919172 is 271919001.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (100919177) 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, 4204954 + ... + 4204977.

Almost surely, 2^100919172 is an apocalyptic number.

100919172 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

100919172 is an abundant number, since it is smaller than the sum of its proper divisors (134558924).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

100919172 is a wasteful number, since it uses less digits than its factorization.

100919172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8409938 (or 8409936 counting only the distinct ones).

The product of its (nonzero) digits is 1134, while the sum is 30.

The square root of 100919172 is about 10045.8534729509. The cubic root of 100919172 is about 465.5766876709.

The spelling of 100919172 in words is "one hundred million, nine hundred nineteen thousand, one hundred seventy-two".