190491 has 16 divisors (see below), whose sum is σ = 297984. Its totient is φ = 105984.

The previous prime is 190471. The next prime is 190507. The reversal of 190491 is 194091.

190491 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 190491 - 2¹⁰ = 189467 is a prime.

190491 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (190471) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 891 + ... + 1083.

It is an arithmetic number, because the mean of its divisors is an integer number (18624).

2¹⁹⁰⁴⁹¹ is an apocalyptic number.

190491 is a deficient number, since it is larger than the sum of its proper divisors (107493).

190491 is a wasteful number, since it uses less digits than its factorization.

190491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 250.

The product of its (nonzero) digits is 324, while the sum is 24.

The square root of 190491 is about 436.4527465832. The cubic root of 190491 is about 57.5384493940.

Subtracting 190491 from its reverse (194091), we obtain a square (3600 = 60²).

The spelling of 190491 in words is "one hundred ninety thousand, four hundred ninety-one".