164242209 has 8 divisors (see below), whose sum is σ = 219136320. Its totient is φ = 109421456.

The previous prime is 164242193. The next prime is 164242217. The reversal of 164242209 is 902242461.

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

It is a cyclic number.

It is not a de Polignac number, because 164242209 - 2⁴ = 164242193 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (164242279) 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 in 7 ways as a sum of consecutive naturals, for example, 12882 + ... + 22235.

It is an arithmetic number, because the mean of its divisors is an integer number (27392040).

Almost surely, 2^164242209 is an apocalyptic number.

It is an amenable number.

164242209 is a deficient number, since it is larger than the sum of its proper divisors (54894111).

164242209 is a wasteful number, since it uses less digits than its factorization.

164242209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36679.

The product of its (nonzero) digits is 6912, while the sum is 30.

The square root of 164242209 is about 12815.7016585125. The cubic root of 164242209 is about 547.6397024704.

It can be divided in two parts, 164242 and 209, that added together give a triangular number (164451 = T₅₇₃).

The spelling of 164242209 in words is "one hundred sixty-four million, two hundred forty-two thousand, two hundred nine".