138719219 has 2 divisors, whose sum is σ = 138719220. Its totient is φ = 138719218.

The previous prime is 138719197. The next prime is 138719221. The reversal of 138719219 is 912917831.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-138719219 is a prime.

It is a super-2 number, since 2×138719219² = 38486043439939922, which contains 22 as substring.

Together with 138719221, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (138719239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69359609 + 69359610.

It is an arithmetic number, because the mean of its divisors is an integer number (69359610).

Almost surely, 2^138719219 is an apocalyptic number.

138719219 is a deficient number, since it is larger than the sum of its proper divisors (1).

138719219 is an equidigital number, since it uses as much as digits as its factorization.

138719219 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 27216, while the sum is 41.

The square root of 138719219 is about 11777.9123362334. The cubic root of 138719219 is about 517.6611168771.

The spelling of 138719219 in words is "one hundred thirty-eight million, seven hundred nineteen thousand, two hundred nineteen".