190609 has 4 divisors (see below), whose sum is σ = 195300. Its totient is φ = 185920.

The previous prime is 190607. The next prime is 190613. The reversal of 190609 is 906091.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 102400 + 88209 = 320^2 + 297^2 .

It is a cyclic number.

It is not a de Polignac number, because 190609 - 2¹ = 190607 is a prime.

It is a Duffinian number.

190609 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (190607) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2284 + ... + 2365.

It is an arithmetic number, because the mean of its divisors is an integer number (48825).

2¹⁹⁰⁶⁰⁹ is an apocalyptic number.

It is an amenable number.

190609 is a deficient number, since it is larger than the sum of its proper divisors (4691).

190609 is an equidigital number, since it uses as much as digits as its factorization.

190609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4690.

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

The square root of 190609 is about 436.5879063831. The cubic root of 190609 is about 57.5503277077.

The spelling of 190609 in words is "one hundred ninety thousand, six hundred nine".