100091009 has 8 divisors (see below), whose sum is σ = 105024192. Its totient is φ = 95206320.

The previous prime is 100090999. The next prime is 100091023. The reversal of 100091009 is 900190001.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-100091009 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (100091029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7859 + ... + 16184.

It is an arithmetic number, because the mean of its divisors is an integer number (13128024).

Almost surely, 2^100091009 is an apocalyptic number.

It is an amenable number.

100091009 is a deficient number, since it is larger than the sum of its proper divisors (4933183).

100091009 is a wasteful number, since it uses less digits than its factorization.

100091009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24247.

The product of its (nonzero) digits is 81, while the sum is 20.

The square root of 100091009 is about 10004.5494151411. The cubic root of 100091009 is about 464.2996494527.

The spelling of 100091009 in words is "one hundred million, ninety-one thousand, nine".