109191011 has 4 divisors (see below), whose sum is σ = 111514272. Its totient is φ = 106867752.

The previous prime is 109191007. The next prime is 109191029. The reversal of 109191011 is 110191901.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 110191901 = 3217 ⋅34253.

It is a cyclic number.

It is not a de Polignac number, because 109191011 - 2² = 109191007 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (109191041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1161560 + ... + 1161653.

It is an arithmetic number, because the mean of its divisors is an integer number (27878568).

Almost surely, 2^109191011 is an apocalyptic number.

109191011 is a deficient number, since it is larger than the sum of its proper divisors (2323261).

109191011 is an equidigital number, since it uses as much as digits as its factorization.

109191011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2323260.

The product of its (nonzero) digits is 81, while the sum is 23.

The square root of 109191011 is about 10449.4502726220. The cubic root of 109191011 is about 477.9644864870.

The spelling of 109191011 in words is "one hundred nine million, one hundred ninety-one thousand, eleven".