100190091 has 16 divisors (see below), whose sum is σ = 137154560. Its totient is φ = 65033280.

The previous prime is 100190053. The next prime is 100190137. The reversal of 100190091 is 190091001.

It is a de Polignac number, because none of the positive numbers 2^k-100190091 is a prime.

It is the 10010-th Hogben number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (100190291) by changing a digit.

It is a nontrivial repunit in base 10009.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14406 + ... + 20196.

It is an arithmetic number, because the mean of its divisors is an integer number (8572160).

Almost surely, 2^100190091 is an apocalyptic number.

100190091 is a deficient number, since it is larger than the sum of its proper divisors (36964469).

100190091 is an equidigital number, since it uses as much as digits as its factorization.

100190091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5946.

The product of its (nonzero) digits is 81, while the sum is 21.

The square root of 100190091 is about 10009.5000374644. The cubic root of 100190091 is about 464.4528052878.

The spelling of 100190091 in words is "one hundred million, one hundred ninety thousand, ninety-one".