164319509 has 2 divisors, whose sum is σ = 164319510. Its totient is φ = 164319508.

The previous prime is 164319503. The next prime is 164319511. The reversal of 164319509 is 905913461.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 104489284 + 59830225 = 10222^2 + 7735^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-164319509 is a prime.

Together with 164319511, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (164319503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82159754 + 82159755.

It is an arithmetic number, because the mean of its divisors is an integer number (82159755).

Almost surely, 2^164319509 is an apocalyptic number.

It is an amenable number.

164319509 is a deficient number, since it is larger than the sum of its proper divisors (1).

164319509 is an equidigital number, since it uses as much as digits as its factorization.

164319509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 29160, while the sum is 38.

The square root of 164319509 is about 12818.7171355015. The cubic root of 164319509 is about 547.7256038754.

The spelling of 164319509 in words is "one hundred sixty-four million, three hundred nineteen thousand, five hundred nine".