138043719 has 24 divisors (see below), whose sum is σ = 218509200. Its totient is φ = 83283840.

The previous prime is 138043693. The next prime is 138043733. The reversal of 138043719 is 917340831.

It is a happy number.

It is not a de Polignac number, because 138043719 - 2⁵ = 138043687 is a prime.

It is a super-2 number, since 2×138043719² = 38112136710701922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138043019) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 19627 + ... + 25715.

It is an arithmetic number, because the mean of its divisors is an integer number (9104550).

Almost surely, 2^138043719 is an apocalyptic number.

138043719 is a deficient number, since it is larger than the sum of its proper divisors (80465481).

138043719 is a wasteful number, since it uses less digits than its factorization.

138043719 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6335 (or 6332 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 36.

The square root of 138043719 is about 11749.2007813298. The cubic root of 138043719 is about 516.8194905996.

The spelling of 138043719 in words is "one hundred thirty-eight million, forty-three thousand, seven hundred nineteen".