138600019 has 8 divisors (see below), whose sum is σ = 145521360. Its totient is φ = 131821536.

The previous prime is 138600017. The next prime is 138600043. The reversal of 138600019 is 910006831.

It is a happy number.

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 138600019 - 2¹ = 138600017 is a prime.

It is a super-2 number, since 2×138600019² = 38419930533600722, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 138600019.

It is not an unprimeable number, because it can be changed into a prime (138600017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33724 + ... + 37609.

It is an arithmetic number, because the mean of its divisors is an integer number (18190170).

Almost surely, 2^138600019 is an apocalyptic number.

138600019 is a deficient number, since it is larger than the sum of its proper divisors (6921341).

138600019 is an equidigital number, since it uses as much as digits as its factorization.

138600019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71429.

The product of its (nonzero) digits is 1296, while the sum is 28.

The square root of 138600019 is about 11772.8509291505. The cubic root of 138600019 is about 517.5128007600.

The spelling of 138600019 in words is "one hundred thirty-eight million, six hundred thousand, nineteen".