138899319 has 8 divisors (see below), whose sum is σ = 199445232. Its totient is φ = 85476480.

The previous prime is 138899281. The next prime is 138899339. The reversal of 138899319 is 913998831.

It is a happy number.

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

It is not a de Polignac number, because 138899319 - 2⁷ = 138899191 is a prime.

It is a super-2 number, since 2×138899319² = 38586041637327522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138899339) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1780722 + ... + 1780799.

It is an arithmetic number, because the mean of its divisors is an integer number (24930654).

Almost surely, 2^138899319 is an apocalyptic number.

138899319 is a deficient number, since it is larger than the sum of its proper divisors (60545913).

138899319 is a wasteful number, since it uses less digits than its factorization.

138899319 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3561537.

The product of its digits is 419904, while the sum is 51.

The square root of 138899319 is about 11785.5555236060. Note that the first 4 decimals coincide. The cubic root of 138899319 is about 517.8850475133.

The spelling of 138899319 in words is "one hundred thirty-eight million, eight hundred ninety-nine thousand, three hundred nineteen".