190091109 has 8 divisors (see below), whose sum is σ = 272951392. Its totient is φ = 116979120.

The previous prime is 190091107. The next prime is 190091119. The reversal of 190091109 is 901190091.

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

It is not a de Polignac number, because 190091109 - 2¹ = 190091107 is a prime.

It is a super-2 number, since 2×190091109² = 72269259441699762, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (190091107) 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, 2437027 + ... + 2437104.

It is an arithmetic number, because the mean of its divisors is an integer number (34118924).

Almost surely, 2^190091109 is an apocalyptic number.

It is an amenable number.

190091109 is a deficient number, since it is larger than the sum of its proper divisors (82860283).

190091109 is a wasteful number, since it uses less digits than its factorization.

190091109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4874147.

The product of its (nonzero) digits is 729, while the sum is 30.

The square root of 190091109 is about 13787.3532267800. The cubic root of 190091109 is about 574.9815837832.

The spelling of 190091109 in words is "one hundred ninety million, ninety-one thousand, one hundred nine".