164671009 has 2 divisors, whose sum is σ = 164671010. Its totient is φ = 164671008.

The previous prime is 164670973. The next prime is 164671049. The reversal of 164671009 is 900176461.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 132181009 + 32490000 = 11497^2 + 5700^2 .

It is a cyclic number.

It is not a de Polignac number, because 164671009 - 2¹¹ = 164668961 is a prime.

It is not a weakly prime, because it can be changed into another prime (164671049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82335504 + 82335505.

It is an arithmetic number, because the mean of its divisors is an integer number (82335505).

Almost surely, 2^164671009 is an apocalyptic number.

It is an amenable number.

164671009 is a deficient number, since it is larger than the sum of its proper divisors (1).

164671009 is an equidigital number, since it uses as much as digits as its factorization.

164671009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9072, while the sum is 34.

The square root of 164671009 is about 12832.4202315853. The cubic root of 164671009 is about 548.1158769377.

The spelling of 164671009 in words is "one hundred sixty-four million, six hundred seventy-one thousand, nine".