39047009 has 2 divisors, whose sum is σ = 39047010. Its totient is φ = 39047008.

The previous prime is 39047003. The next prime is 39047017. The reversal of 39047009 is 90074093.

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., 24720784 + 14326225 = 4972^2 + 3785^2 .

It is an emirp because it is prime and its reverse (90074093) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 39047009 - 2⁴ = 39046993 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (39047003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19523504 + 19523505.

It is an arithmetic number, because the mean of its divisors is an integer number (19523505).

Almost surely, 2^39047009 is an apocalyptic number.

It is an amenable number.

39047009 is a deficient number, since it is larger than the sum of its proper divisors (1).

39047009 is an equidigital number, since it uses as much as digits as its factorization.

39047009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6804, while the sum is 32.

The square root of 39047009 is about 6248.7605971104. The cubic root of 39047009 is about 339.2573438312.

The spelling of 39047009 in words is "thirty-nine million, forty-seven thousand, nine".