190906 has 8 divisors (see below), whose sum is σ = 291924. Its totient is φ = 93600.

The previous prime is 190901. The next prime is 190909. The reversal of 190906 is 609091.

190906 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 189225 + 1681 = 435^2 + 41^2 .

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (190901) by changing a digit.

190906 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

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 3 ways as a sum of consecutive naturals, for example, 795 + ... + 1006.

2¹⁹⁰⁹⁰⁶ is an apocalyptic number.

190906 is a deficient number, since it is larger than the sum of its proper divisors (101018).

190906 is a wasteful number, since it uses less digits than its factorization.

190906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1856.

The product of its (nonzero) digits is 486, while the sum is 25.

The square root of 190906 is about 436.9279116742. The cubic root of 190906 is about 57.5802031375.

Adding to 190906 its reverse (609091), we get a palindrome (799997).

The spelling of 190906 in words is "one hundred ninety thousand, nine hundred six".