190406 has 4 divisors (see below), whose sum is σ = 285612. Its totient is φ = 95202.

The previous prime is 190403. The next prime is 190409. The reversal of 190406 is 604091.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 604091 = 47 ⋅12853.

It is an interprime number because it is at equal distance from previous prime (190403) and next prime (190409).

It is a plaindrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (190403) 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 as a sum of consecutive naturals, namely, 47600 + ... + 47603.

It is an arithmetic number, because the mean of its divisors is an integer number (71403).

2¹⁹⁰⁴⁰⁶ is an apocalyptic number.

190406 is a deficient number, since it is larger than the sum of its proper divisors (95206).

190406 is an equidigital number, since it uses as much as digits as its factorization.

190406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95205.

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 190406 is about 436.3553597700. The cubic root of 190406 is about 57.5298899418.

Adding to 190406 its reverse (604091), we get a palindrome (794497).

The spelling of 190406 in words is "one hundred ninety thousand, four hundred six".