39987107 has 2 divisors, whose sum is σ = 39987108. Its totient is φ = 39987106.

The previous prime is 39987097. The next prime is 39987109. The reversal of 39987107 is 70178993.

It is a strong prime.

It is an emirp because it is prime and its reverse (70178993) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 39987107 - 2¹⁰ = 39986083 is a prime.

Together with 39987109, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (39987109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19993553 + 19993554.

It is an arithmetic number, because the mean of its divisors is an integer number (19993554).

Almost surely, 2^39987107 is an apocalyptic number.

39987107 is a deficient number, since it is larger than the sum of its proper divisors (1).

39987107 is an equidigital number, since it uses as much as digits as its factorization.

39987107 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 95256, while the sum is 44.

The square root of 39987107 is about 6323.5359570418. The cubic root of 39987107 is about 341.9584408536.

The spelling of 39987107 in words is "thirty-nine million, nine hundred eighty-seven thousand, one hundred seven".