138590687 has 2 divisors, whose sum is σ = 138590688. Its totient is φ = 138590686.

The previous prime is 138590659. The next prime is 138590737. The reversal of 138590687 is 786095831.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 138590687 - 2¹⁰ = 138589663 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (138590657) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69295343 + 69295344.

It is an arithmetic number, because the mean of its divisors is an integer number (69295344).

Almost surely, 2^138590687 is an apocalyptic number.

138590687 is a deficient number, since it is larger than the sum of its proper divisors (1).

138590687 is an equidigital number, since it uses as much as digits as its factorization.

138590687 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 362880, while the sum is 47.

The square root of 138590687 is about 11772.4545868735. The cubic root of 138590687 is about 517.5011857115.

The spelling of 138590687 in words is "one hundred thirty-eight million, five hundred ninety thousand, six hundred eighty-seven".