138788219 has 8 divisors (see below), whose sum is σ = 142222080. Its totient is φ = 135363816.

The previous prime is 138788213. The next prime is 138788231. The reversal of 138788219 is 912887831.

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 138788219 - 2⁴ = 138788203 is a prime.

It is a super-2 number, since 2×138788219² = 38524339466383922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138788213) 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, 34154 + ... + 38000.

It is an arithmetic number, because the mean of its divisors is an integer number (17777760).

Almost surely, 2^138788219 is an apocalyptic number.

138788219 is a deficient number, since it is larger than the sum of its proper divisors (3433861).

138788219 is an equidigital number, since it uses as much as digits as its factorization.

138788219 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4729.

The product of its digits is 193536, while the sum is 47.

The square root of 138788219 is about 11780.8411838884. The cubic root of 138788219 is about 517.7469321826.

The spelling of 138788219 in words is "one hundred thirty-eight million, seven hundred eighty-eight thousand, two hundred nineteen".