101000091 has 4 divisors (see below), whose sum is σ = 134666792. Its totient is φ = 67333392.

The previous prime is 101000059. The next prime is 101000093. The reversal of 101000091 is 190000101.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 101000091 - 2⁵ = 101000059 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (101000093) 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, 16833346 + ... + 16833351.

It is an arithmetic number, because the mean of its divisors is an integer number (33666698).

Almost surely, 2^101000091 is an apocalyptic number.

101000091 is a deficient number, since it is larger than the sum of its proper divisors (33666701).

101000091 is an equidigital number, since it uses as much as digits as its factorization.

101000091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33666700.

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

The square root of 101000091 is about 10049.8801485391. The cubic root of 101000091 is about 465.7010906443.

Adding to 101000091 its reverse (190000101), we get a palindrome (291000192).

The spelling of 101000091 in words is "one hundred one million, ninety-one", and thus it is an aban number.