39385109987 has 2 divisors, whose sum is σ = 39385109988. Its totient is φ = 39385109986.

The previous prime is 39385109977. The next prime is 39385110007. The reversal of 39385109987 is 78990158393.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 39385109987 - 2⁴ = 39385109971 is a prime.

It is not a weakly prime, because it can be changed into another prime (39385109957) 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, 19692554993 + 19692554994.

It is an arithmetic number, because the mean of its divisors is an integer number (19692554994).

Almost surely, 2^39385109987 is an apocalyptic number.

39385109987 is a deficient number, since it is larger than the sum of its proper divisors (1).

39385109987 is an equidigital number, since it uses as much as digits as its factorization.

39385109987 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 14696640, while the sum is 62.

The spelling of 39385109987 in words is "thirty-nine billion, three hundred eighty-five million, one hundred nine thousand, nine hundred eighty-seven".