39806699 has 2 divisors, whose sum is σ = 39806700. Its totient is φ = 39806698.

The previous prime is 39806677. The next prime is 39806713. The reversal of 39806699 is 99660893.

It is a strong prime.

It is an emirp because it is prime and its reverse (99660893) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-39806699 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (39806609) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19903349 + 19903350.

It is an arithmetic number, because the mean of its divisors is an integer number (19903350).

Almost surely, 2^39806699 is an apocalyptic number.

39806699 is a deficient number, since it is larger than the sum of its proper divisors (1).

39806699 is an equidigital number, since it uses as much as digits as its factorization.

39806699 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 629856, while the sum is 50.

The square root of 39806699 is about 6309.2550273388. The cubic root of 39806699 is about 341.4433994315.

The spelling of 39806699 in words is "thirty-nine million, eight hundred six thousand, six hundred ninety-nine".