39985087 has 2 divisors, whose sum is σ = 39985088. Its totient is φ = 39985086.

The previous prime is 39985081. The next prime is 39985111. The reversal of 39985087 is 78058993.

It is a weak prime.

It is an emirp because it is prime and its reverse (78058993) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 39985087 - 2³ = 39985079 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 39985087.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (39985081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19992543 + 19992544.

It is an arithmetic number, because the mean of its divisors is an integer number (19992544).

Almost surely, 2^39985087 is an apocalyptic number.

39985087 is a deficient number, since it is larger than the sum of its proper divisors (1).

39985087 is an equidigital number, since it uses as much as digits as its factorization.

39985087 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 544320, while the sum is 49.

The square root of 39985087 is about 6323.3762342597. The cubic root of 39985087 is about 341.9526826002.

The spelling of 39985087 in words is "thirty-nine million, nine hundred eighty-five thousand, eighty-seven".