164373794309 has 2 divisors, whose sum is σ = 164373794310. Its totient is φ = 164373794308.

The previous prime is 164373794293. The next prime is 164373794381. The reversal of 164373794309 is 903497373461.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 102337929409 + 62035864900 = 319903^2 + 249070^2 .

It is a cyclic number.

It is not a de Polignac number, because 164373794309 - 2⁴ = 164373794293 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (164373794009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82186897154 + 82186897155.

It is an arithmetic number, because the mean of its divisors is an integer number (82186897155).

Almost surely, 2^164373794309 is an apocalyptic number.

It is an amenable number.

164373794309 is a deficient number, since it is larger than the sum of its proper divisors (1).

164373794309 is an equidigital number, since it uses as much as digits as its factorization.

164373794309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10287648, while the sum is 56.

The spelling of 164373794309 in words is "one hundred sixty-four billion, three hundred seventy-three million, seven hundred ninety-four thousand, three hundred nine".