39907813 has 16 divisors (see below), whose sum is σ = 44582976. Its totient is φ = 35418240.

The previous prime is 39907807. The next prime is 39907817. The reversal of 39907813 is 31870993.

39907813 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a de Polignac number, because none of the positive numbers 2^k-39907813 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39907817) 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 15 ways as a sum of consecutive naturals, for example, 127345 + ... + 127657.

It is an arithmetic number, because the mean of its divisors is an integer number (2786436).

Almost surely, 2^39907813 is an apocalyptic number.

It is an amenable number.

39907813 is a deficient number, since it is larger than the sum of its proper divisors (4675163).

39907813 is a wasteful number, since it uses less digits than its factorization.

39907813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 564.

The product of its (nonzero) digits is 40824, while the sum is 40.

The square root of 39907813 is about 6317.2630940938. The cubic root of 39907813 is about 341.7322579870.

The spelling of 39907813 in words is "thirty-nine million, nine hundred seven thousand, eight hundred thirteen".