100491111 has 40 divisors (see below), whose sum is σ = 175111200. Its totient is φ = 57407616.

The previous prime is 100491109. The next prime is 100491173. The reversal of 100491111 is 111194001.

It is not a de Polignac number, because 100491111 - 2¹ = 100491109 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100491211) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 25975 + ... + 29591.

It is an arithmetic number, because the mean of its divisors is an integer number (4377780).

Almost surely, 2^100491111 is an apocalyptic number.

100491111 is a deficient number, since it is larger than the sum of its proper divisors (74620089).

100491111 is an frugal number, since it uses more digits than its factorization.

100491111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3650 (or 3627 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 18.

The square root of 100491111 is about 10024.5254750537. The cubic root of 100491111 is about 464.9174879610.

The spelling of 100491111 in words is "one hundred million, four hundred ninety-one thousand, one hundred eleven".