138595999 has 8 divisors (see below), whose sum is σ = 146782080. Its totient is φ = 130589976.

The previous prime is 138595993. The next prime is 138596011. The reversal of 138595999 is 999595831.

138595999 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 138595999 - 2³ = 138595991 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138595991) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43429 + ... + 46510.

It is an arithmetic number, because the mean of its divisors is an integer number (18347760).

Almost surely, 2^138595999 is an apocalyptic number.

138595999 is a deficient number, since it is larger than the sum of its proper divisors (8186081).

138595999 is an equidigital number, since it uses as much as digits as its factorization.

138595999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90029.

The product of its digits is 3936600, while the sum is 58.

The square root of 138595999 is about 11772.6801961151. The cubic root of 138595999 is about 517.5077973418.

The spelling of 138595999 in words is "one hundred thirty-eight million, five hundred ninety-five thousand, nine hundred ninety-nine".