100191906 has 24 divisors (see below), whose sum is σ = 217801584. Its totient is φ = 33286680.

The previous prime is 100191869. The next prime is 100191913. The reversal of 100191906 is 609191001.

It is a self number, because there is not a number n which added to its sum of digits gives 100191906.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3540 + ... + 14591.

It is an arithmetic number, because the mean of its divisors is an integer number (9075066).

Almost surely, 2^100191906 is an apocalyptic number.

100191906 is an abundant number, since it is smaller than the sum of its proper divisors (117609678).

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

100191906 is a wasteful number, since it uses less digits than its factorization.

100191906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18446 (or 18443 counting only the distinct ones).

The product of its (nonzero) digits is 486, while the sum is 27.

The square root of 100191906 is about 10009.5907009228. The cubic root of 100191906 is about 464.4556098791.

The spelling of 100191906 in words is "one hundred million, one hundred ninety-one thousand, nine hundred six".