138737686 has 16 divisors (see below), whose sum is σ = 213591168. Its totient is φ = 67547200.

The previous prime is 138737659. The next prime is 138737693. The reversal of 138737686 is 686737831.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 52251 + ... + 54841.

It is an arithmetic number, because the mean of its divisors is an integer number (13349448).

Almost surely, 2^138737686 is an apocalyptic number.

138737686 is a deficient number, since it is larger than the sum of its proper divisors (74853482).

138737686 is a wasteful number, since it uses less digits than its factorization.

138737686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3287.

The product of its digits is 1016064, while the sum is 49.

The square root of 138737686 is about 11778.6962776022. The cubic root of 138737686 is about 517.6840870748.

The spelling of 138737686 in words is "one hundred thirty-eight million, seven hundred thirty-seven thousand, six hundred eighty-six".