191123493 has 12 divisors (see below), whose sum is σ = 280104384. Its totient is φ = 115832200.

The previous prime is 191123473. The next prime is 191123497. The reversal of 191123493 is 394321191.

It is a happy number.

It is not a de Polignac number, because 191123493 - 2⁸ = 191123237 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (191123497) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 262893 + ... + 263618.

It is an arithmetic number, because the mean of its divisors is an integer number (23342032).

Almost surely, 2^191123493 is an apocalyptic number.

It is an amenable number.

191123493 is a deficient number, since it is larger than the sum of its proper divisors (88980891).

191123493 is a wasteful number, since it uses less digits than its factorization.

191123493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 526536 (or 526525 counting only the distinct ones).

The product of its digits is 5832, while the sum is 33.

The square root of 191123493 is about 13824.7420590765. The cubic root of 191123493 is about 576.0206125677.

The spelling of 191123493 in words is "one hundred ninety-one million, one hundred twenty-three thousand, four hundred ninety-three".