164335609 has 4 divisors (see below), whose sum is σ = 164631204. Its totient is φ = 164040016.

The previous prime is 164335607. The next prime is 164335631. The reversal of 164335609 is 906533461.

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 25755625 + 138579984 = 5075^2 + 11772^2 .

It is a cyclic number.

It is not a de Polignac number, because 164335609 - 2¹ = 164335607 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (164335607) 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, 146962 + ... + 148075.

It is an arithmetic number, because the mean of its divisors is an integer number (41157801).

Almost surely, 2^164335609 is an apocalyptic number.

It is an amenable number.

164335609 is a deficient number, since it is larger than the sum of its proper divisors (295595).

164335609 is an equidigital number, since it uses as much as digits as its factorization.

164335609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 295594.

The product of its (nonzero) digits is 58320, while the sum is 37.

The square root of 164335609 is about 12819.3451080779. The cubic root of 164335609 is about 547.7434919811.

The spelling of 164335609 in words is "one hundred sixty-four million, three hundred thirty-five thousand, six hundred nine".