191909092 has 12 divisors (see below), whose sum is σ = 337029616. Its totient is φ = 95614920.

The previous prime is 191909089. The next prime is 191909093. The reversal of 191909092 is 290909191.

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (191909093) 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, 83634 + ... + 85897.

Almost surely, 2^191909092 is an apocalyptic number.

It is an amenable number.

191909092 is a deficient number, since it is larger than the sum of its proper divisors (145120524).

191909092 is a wasteful number, since it uses less digits than its factorization.

191909092 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 169818 (or 169816 counting only the distinct ones).

The product of its (nonzero) digits is 13122, while the sum is 40.

The square root of 191909092 is about 13853.1257122716. The cubic root of 191909092 is about 576.8087637325.

Subtracting 191909092 from its reverse (290909191), we obtain a palindrome (99000099).

It can be divided in two parts, 19190 and 9092, that added together give a palindrome (28282).

The spelling of 191909092 in words is "one hundred ninety-one million, nine hundred nine thousand, ninety-two".