138680659 has 4 divisors (see below), whose sum is σ = 149348416. Its totient is φ = 128012904.

The previous prime is 138680653. The next prime is 138680669. The reversal of 138680659 is 956086831.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 138680659 - 2³ = 138680651 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138680651) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5333859 + ... + 5333884.

It is an arithmetic number, because the mean of its divisors is an integer number (37337104).

Almost surely, 2^138680659 is an apocalyptic number.

138680659 is a deficient number, since it is larger than the sum of its proper divisors (10667757).

138680659 is a wasteful number, since it uses less digits than its factorization.

138680659 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10667756.

The product of its (nonzero) digits is 311040, while the sum is 46.

The square root of 138680659 is about 11776.2752600302. The cubic root of 138680659 is about 517.6131474065.

The spelling of 138680659 in words is "one hundred thirty-eight million, six hundred eighty thousand, six hundred fifty-nine".