18160609 has 4 divisors (see below), whose sum is σ = 18503316. Its totient is φ = 17817904.

The previous prime is 18160591. The next prime is 18160621. The reversal of 18160609 is 90606181.

It is a happy number.

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 10543009 + 7617600 = 3247^2 + 2760^2 .

It is a cyclic number.

It is not a de Polignac number, because 18160609 - 2⁷ = 18160481 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18160669) 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, 171274 + ... + 171379.

It is an arithmetic number, because the mean of its divisors is an integer number (4625829).

Almost surely, 2^18160609 is an apocalyptic number.

It is an amenable number.

18160609 is a deficient number, since it is larger than the sum of its proper divisors (342707).

18160609 is an equidigital number, since it uses as much as digits as its factorization.

18160609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 342706.

The product of its (nonzero) digits is 2592, while the sum is 31.

The square root of 18160609 is about 4261.5266043989. The cubic root of 18160609 is about 262.8513040915.

It can be divided in two parts, 18160 and 609, that added together give a square (18769 = 137²).

The spelling of 18160609 in words is "eighteen million, one hundred sixty thousand, six hundred nine".