39164809 has 2 divisors, whose sum is σ = 39164810. Its totient is φ = 39164808.

The previous prime is 39164773. The next prime is 39164831. The reversal of 39164809 is 90846193.

39164809 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 38093584 + 1071225 = 6172^2 + 1035^2 .

It is an emirp because it is prime and its reverse (90846193) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 39164809 - 2¹⁹ = 38640521 is a prime.

It is not a weakly prime, because it can be changed into another prime (39164869) 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, 19582404 + 19582405.

It is an arithmetic number, because the mean of its divisors is an integer number (19582405).

Almost surely, 2^39164809 is an apocalyptic number.

It is an amenable number.

39164809 is a deficient number, since it is larger than the sum of its proper divisors (1).

39164809 is an equidigital number, since it uses as much as digits as its factorization.

39164809 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 46656, while the sum is 40.

The square root of 39164809 is about 6258.1793678353. The cubic root of 39164809 is about 339.5981671449.

The spelling of 39164809 in words is "thirty-nine million, one hundred sixty-four thousand, eight hundred nine".