39397009 has 2 divisors, whose sum is σ = 39397010. Its totient is φ = 39397008.

The previous prime is 39396989. The next prime is 39397021. The reversal of 39397009 is 90079393.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 37859409 + 1537600 = 6153^2 + 1240^2 .

It is an emirp because it is prime and its reverse (90079393) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 39397009 - 2⁷ = 39396881 is a prime.

It is a Chen prime.

It is a weakly prime.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19698504 + 19698505.

It is an arithmetic number, because the mean of its divisors is an integer number (19698505).

Almost surely, 2^39397009 is an apocalyptic number.

It is an amenable number.

39397009 is a deficient number, since it is larger than the sum of its proper divisors (1).

39397009 is an equidigital number, since it uses as much as digits as its factorization.

39397009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 45927, while the sum is 40.

The square root of 39397009 is about 6276.7036731074. The cubic root of 39397009 is about 340.2679807693.

The spelling of 39397009 in words is "thirty-nine million, three hundred ninety-seven thousand, nine".