164686009 has 2 divisors, whose sum is σ = 164686010. Its totient is φ = 164686008.

The previous prime is 164685973. The next prime is 164686019. The reversal of 164686009 is 900686461.

164686009 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 141134400 + 23551609 = 11880^2 + 4853^2 .

It is a cyclic number.

It is not a de Polignac number, because 164686009 - 2¹³ = 164677817 is a prime.

It is not a weakly prime, because it can be changed into another prime (164686019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82343004 + 82343005.

It is an arithmetic number, because the mean of its divisors is an integer number (82343005).

Almost surely, 2^164686009 is an apocalyptic number.

It is an amenable number.

164686009 is a deficient number, since it is larger than the sum of its proper divisors (1).

164686009 is an equidigital number, since it uses as much as digits as its factorization.

164686009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 62208, while the sum is 40.

The square root of 164686009 is about 12833.0046754453. The cubic root of 164686009 is about 548.1325191882.

The spelling of 164686009 in words is "one hundred sixty-four million, six hundred eighty-six thousand, nine".