138793899 has 8 divisors (see below), whose sum is σ = 195944400. Its totient is φ = 87086336.

The previous prime is 138793883. The next prime is 138793931. The reversal of 138793899 is 998397831.

138793899 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 138793899 - 2⁴ = 138793883 is a prime.

It is not an unprimeable number, because it can be changed into a prime (138793819) 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, 1360674 + ... + 1360775.

It is an arithmetic number, because the mean of its divisors is an integer number (24493050).

Almost surely, 2^138793899 is an apocalyptic number.

138793899 is a deficient number, since it is larger than the sum of its proper divisors (57150501).

138793899 is a wasteful number, since it uses less digits than its factorization.

138793899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2721469.

The product of its digits is 2939328, while the sum is 57.

The square root of 138793899 is about 11781.0822507951. The cubic root of 138793899 is about 517.7539951319.

The spelling of 138793899 in words is "one hundred thirty-eight million, seven hundred ninety-three thousand, eight hundred ninety-nine".