164509739 has 2 divisors, whose sum is σ = 164509740. Its totient is φ = 164509738.

The previous prime is 164509711. The next prime is 164509783. The reversal of 164509739 is 937905461.

164509739 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an a-pointer prime, because the next prime (164509783) can be obtained adding 164509739 to its sum of digits (44).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 164509739 - 2²⁰ = 163461163 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 164509739.

It is not a weakly prime, because it can be changed into another prime (164509789) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82254869 + 82254870.

It is an arithmetic number, because the mean of its divisors is an integer number (82254870).

Almost surely, 2^164509739 is an apocalyptic number.

164509739 is a deficient number, since it is larger than the sum of its proper divisors (1).

164509739 is an equidigital number, since it uses as much as digits as its factorization.

164509739 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 204120, while the sum is 44.

The square root of 164509739 is about 12826.1349985099. The cubic root of 164509739 is about 547.9368866790.

The spelling of 164509739 in words is "one hundred sixty-four million, five hundred nine thousand, seven hundred thirty-nine".