138489219 has 30 divisors (see below), whose sum is σ = 220251980. Its totient is φ = 83853000.

The previous prime is 138489209. The next prime is 138489223. The reversal of 138489219 is 912984831.

It is not a de Polignac number, because 138489219 - 2⁴ = 138489203 is a prime.

It is a super-2 number, since 2×138489219² = 38358527558459922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138489209) by changing a digit.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 131244 + ... + 132294.

Almost surely, 2^138489219 is an apocalyptic number.

138489219 is a deficient number, since it is larger than the sum of its proper divisors (81762761).

138489219 is an equidigital number, since it uses as much as digits as its factorization.

138489219 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1101 (or 1065 counting only the distinct ones).

The product of its digits is 124416, while the sum is 45.

The square root of 138489219 is about 11768.1442462268. The cubic root of 138489219 is about 517.3748601708.

The spelling of 138489219 in words is "one hundred thirty-eight million, four hundred eighty-nine thousand, two hundred nineteen".