138189519 has 24 divisors (see below), whose sum is σ = 215469072. Its totient is φ = 84839040.

The previous prime is 138189517. The next prime is 138189523. The reversal of 138189519 is 915981831.

It is not a de Polignac number, because 138189519 - 2¹ = 138189517 is a prime.

It is a super-2 number, since 2×138189519² = 38192686322902722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138189517) 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, 59824 + ... + 62090.

It is an arithmetic number, because the mean of its divisors is an integer number (8977878).

Almost surely, 2^138189519 is an apocalyptic number.

138189519 is a deficient number, since it is larger than the sum of its proper divisors (77279553).

138189519 is a wasteful number, since it uses less digits than its factorization.

138189519 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2807 (or 2804 counting only the distinct ones).

The product of its digits is 77760, while the sum is 45.

The square root of 138189519 is about 11755.4038212220. The cubic root of 138189519 is about 517.0013792774.

The spelling of 138189519 in words is "one hundred thirty-eight million, one hundred eighty-nine thousand, five hundred nineteen".