39138587 has 2 divisors, whose sum is σ = 39138588. Its totient is φ = 39138586.

The previous prime is 39138569. The next prime is 39138599. The reversal of 39138587 is 78583193.

It is a happy number.

39138587 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 39138587 - 2⁸ = 39138331 is a prime.

It is a Chen prime.

It is a plaindrome in base 12.

It is not a weakly prime, because it can be changed into another prime (39138527) 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 as a sum of consecutive naturals, namely, 19569293 + 19569294.

It is an arithmetic number, because the mean of its divisors is an integer number (19569294).

Almost surely, 2^39138587 is an apocalyptic number.

39138587 is a deficient number, since it is larger than the sum of its proper divisors (1).

39138587 is an equidigital number, since it uses as much as digits as its factorization.

39138587 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 181440, while the sum is 44.

The square root of 39138587 is about 6256.0839987967. The cubic root of 39138587 is about 339.5223598791.

The spelling of 39138587 in words is "thirty-nine million, one hundred thirty-eight thousand, five hundred eighty-seven".