1000100091 has 8 divisors (see below), whose sum is σ = 1356068160. Its totient is φ = 655432712.

The previous prime is 1000100077. The next prime is 1000100161. The reversal of 1000100091 is 1900010001.

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

It is a cyclic number.

It is not a de Polignac number, because 1000100091 - 2⁷ = 1000099963 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1000100051) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2824965 + ... + 2825318.

It is an arithmetic number, because the mean of its divisors is an integer number (169508520).

Almost surely, 2^1000100091 is an apocalyptic number.

1000100091 is a deficient number, since it is larger than the sum of its proper divisors (355968069).

1000100091 is an equidigital number, since it uses as much as digits as its factorization.

1000100091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5650345.

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

The square root of 1000100091 is about 31624.3591397517. The cubic root of 1000100091 is about 1000.0333625536.

Adding to 1000100091 its reverse (1900010001), we get a palindrome (2900110092).

The spelling of 1000100091 in words is "one billion, one hundred thousand, ninety-one".