138335859 has 24 divisors (see below), whose sum is σ = 210013232. Its totient is φ = 87635520.

The previous prime is 138335839. The next prime is 138335863. The reversal of 138335859 is 958533831.

138335859 is a `hidden beast` number, since 1 + 38 + 33 + 585 + 9 = 666.

It is not a de Polignac number, because 138335859 - 2⁹ = 138335347 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138335819) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9489 + ... + 19149.

Almost surely, 2^138335859 is an apocalyptic number.

138335859 is a deficient number, since it is larger than the sum of its proper divisors (71677373).

138335859 is a wasteful number, since it uses less digits than its factorization.

138335859 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9747 (or 9744 counting only the distinct ones).

The product of its digits is 388800, while the sum is 45.

The square root of 138335859 is about 11761.6265456781. The cubic root of 138335859 is about 517.1838130136.

The spelling of 138335859 in words is "one hundred thirty-eight million, three hundred thirty-five thousand, eight hundred fifty-nine".