138517659 has 36 divisors (see below), whose sum is σ = 240795360. Its totient is φ = 76416480.

The previous prime is 138517651. The next prime is 138517669. The reversal of 138517659 is 956715831.

It is a happy number.

It is not a de Polignac number, because 138517659 - 2³ = 138517651 is a prime.

It is not an unprimeable number, because it can be changed into a prime (138517651) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 7374 + ... + 18204.

It is an arithmetic number, because the mean of its divisors is an integer number (6688760).

Almost surely, 2^138517659 is an apocalyptic number.

138517659 is a deficient number, since it is larger than the sum of its proper divisors (102277701).

138517659 is a wasteful number, since it uses less digits than its factorization.

138517659 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10880 (or 10870 counting only the distinct ones).

The product of its digits is 226800, while the sum is 45.

The square root of 138517659 is about 11769.3525310443. The cubic root of 138517659 is about 517.4102735987.

It can be divided in two parts, 1385 and 17659, that added together give a square (19044 = 138²).

The spelling of 138517659 in words is "one hundred thirty-eight million, five hundred seventeen thousand, six hundred fifty-nine".