138318019 has 8 divisors (see below), whose sum is σ = 160079360. Its totient is φ = 117057096.

The previous prime is 138318013. The next prime is 138318029. The reversal of 138318019 is 910813831.

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 138318019 - 2⁵ = 138317987 is a prime.

It is a super-2 number, since 2×138318019² = 38263748760168722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (138318013) 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, 124509 + ... + 125614.

It is an arithmetic number, because the mean of its divisors is an integer number (20009920).

Almost surely, 2^138318019 is an apocalyptic number.

138318019 is a deficient number, since it is larger than the sum of its proper divisors (21761341).

138318019 is an equidigital number, since it uses as much as digits as its factorization.

138318019 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 250209.

The product of its (nonzero) digits is 5184, while the sum is 34.

The square root of 138318019 is about 11760.8681227195. The cubic root of 138318019 is about 517.1615797909.

The spelling of 138318019 in words is "one hundred thirty-eight million, three hundred eighteen thousand, nineteen".