191011092 has 12 divisors (see below), whose sum is σ = 445692576. Its totient is φ = 63670360.

The previous prime is 191011063. The next prime is 191011097. The reversal of 191011092 is 290110191.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (191011097) 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, 7958784 + ... + 7958807.

It is an arithmetic number, because the mean of its divisors is an integer number (37141048).

Almost surely, 2^191011092 is an apocalyptic number.

191011092 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

191011092 is an abundant number, since it is smaller than the sum of its proper divisors (254681484).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

191011092 is a wasteful number, since it uses less digits than its factorization.

191011092 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15917598 (or 15917596 counting only the distinct ones).

The product of its (nonzero) digits is 162, while the sum is 24.

The square root of 191011092 is about 13820.6762497354. The cubic root of 191011092 is about 575.9076699036.

Subtracting 191011092 from its reverse (290110191), we obtain a palindrome (99099099).

The spelling of 191011092 in words is "one hundred ninety-one million, eleven thousand, ninety-two".