39007009 has 4 divisors (see below), whose sum is σ = 39445380. Its totient is φ = 38568640.

The previous prime is 39006967. The next prime is 39007013. The reversal of 39007009 is 90070093.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 90070093 = 23 ⋅3916091.

It can be written as a sum of positive squares in 2 ways, for example, as 4161600 + 34845409 = 2040^2 + 5903^2 .

It is a cyclic number.

It is not a de Polignac number, because 39007009 - 2⁷ = 39006881 is a prime.

It is a super-2 number, since 2×39007009² = 3043093502252162, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (39007069) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 219052 + ... + 219229.

It is an arithmetic number, because the mean of its divisors is an integer number (9861345).

Almost surely, 2^39007009 is an apocalyptic number.

It is an amenable number.

39007009 is a deficient number, since it is larger than the sum of its proper divisors (438371).

39007009 is an equidigital number, since it uses as much as digits as its factorization.

39007009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 438370.

The product of its (nonzero) digits is 1701, while the sum is 28.

The square root of 39007009 is about 6245.5591423026. The cubic root of 39007009 is about 339.1414584700.

The spelling of 39007009 in words is "thirty-nine million, seven thousand, nine".