39868009 has 8 divisors (see below), whose sum is σ = 43195680. Its totient is φ = 36649536.

The previous prime is 39867977. The next prime is 39868013. The reversal of 39868009 is 90086893.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 39868009 - 2⁵ = 39867977 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (39868019) 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 7 ways as a sum of consecutive naturals, for example, 26539 + ... + 28000.

It is an arithmetic number, because the mean of its divisors is an integer number (5399460).

Almost surely, 2^39868009 is an apocalyptic number.

It is an amenable number.

39868009 is a deficient number, since it is larger than the sum of its proper divisors (3327671).

39868009 is a wasteful number, since it uses less digits than its factorization.

39868009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54599.

The product of its (nonzero) digits is 93312, while the sum is 43.

The square root of 39868009 is about 6314.1118932119. Note that the first 3 decimals coincide. The cubic root of 39868009 is about 341.6186057588.

The spelling of 39868009 in words is "thirty-nine million, eight hundred sixty-eight thousand, nine".