39805713 has 6 divisors (see below), whose sum is σ = 57497154. Its totient is φ = 26537136.

The previous prime is 39805699. The next prime is 39805739. The reversal of 39805713 is 31750893.

39805713 is a `hidden beast` number, since 3 + 9 + 80 + 571 + 3 = 666.

39805713 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 31002624 + 8803089 = 5568^2 + 2967^2 .

It is not a de Polignac number, because 39805713 - 2⁴ = 39805697 is a prime.

It is not an unprimeable number, because it can be changed into a prime (39805763) 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 in 5 ways as a sum of consecutive naturals, for example, 2211420 + ... + 2211437.

It is an arithmetic number, because the mean of its divisors is an integer number (9582859).

Almost surely, 2^39805713 is an apocalyptic number.

It is an amenable number.

39805713 is a deficient number, since it is larger than the sum of its proper divisors (17691441).

39805713 is a wasteful number, since it uses less digits than its factorization.

39805713 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4422863 (or 4422860 counting only the distinct ones).

The product of its (nonzero) digits is 22680, while the sum is 36.

The square root of 39805713 is about 6309.1768876772. The cubic root of 39805713 is about 341.4405802581.

The spelling of 39805713 in words is "thirty-nine million, eight hundred five thousand, seven hundred thirteen".