100091001 has 4 divisors (see below), whose sum is σ = 133454672. Its totient is φ = 66727332.

The previous prime is 100090999. The next prime is 100091023. The reversal of 100091001 is 100190001.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 100091001 - 2¹ = 100090999 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (100091051) 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, 16681831 + ... + 16681836.

It is an arithmetic number, because the mean of its divisors is an integer number (33363668).

Almost surely, 2^100091001 is an apocalyptic number.

It is an amenable number.

100091001 is a deficient number, since it is larger than the sum of its proper divisors (33363671).

100091001 is an equidigital number, since it uses as much as digits as its factorization.

100091001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33363670.

The product of its (nonzero) digits is 9, while the sum is 12.

The square root of 100091001 is about 10004.5490153230. The cubic root of 100091001 is about 464.2996370826.

The spelling of 100091001 in words is "one hundred million, ninety-one thousand, one".