164087009 has 4 divisors (see below), whose sum is σ = 173739204. Its totient is φ = 154434816.

The previous prime is 164087003. The next prime is 164087023. The reversal of 164087009 is 900780461.

164087009 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 132894784 + 31192225 = 11528^2 + 5585^2 .

It is a cyclic number.

It is not a de Polignac number, because 164087009 - 2¹² = 164082913 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 164087009.

It is not an unprimeable number, because it can be changed into a prime (164087003) 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, 4826072 + ... + 4826105.

It is an arithmetic number, because the mean of its divisors is an integer number (43434801).

Almost surely, 2^164087009 is an apocalyptic number.

It is an amenable number.

164087009 is a deficient number, since it is larger than the sum of its proper divisors (9652195).

164087009 is an equidigital number, since it uses as much as digits as its factorization.

164087009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9652194.

The product of its (nonzero) digits is 12096, while the sum is 35.

The square root of 164087009 is about 12809.6451551165. The cubic root of 164087009 is about 547.4671514803.

The spelling of 164087009 in words is "one hundred sixty-four million, eighty-seven thousand, nine".