138704719 has 4 divisors (see below), whose sum is σ = 138750040. Its totient is φ = 138659400.

The previous prime is 138704711. The next prime is 138704729. The reversal of 138704719 is 917407831.

138704719 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 138704719 - 2³ = 138704711 is a prime.

It is a super-2 number, since 2×138704719² = 38477998145737922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138704711) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17709 + ... + 24310.

It is an arithmetic number, because the mean of its divisors is an integer number (34687510).

Almost surely, 2^138704719 is an apocalyptic number.

138704719 is a deficient number, since it is larger than the sum of its proper divisors (45321).

138704719 is an equidigital number, since it uses as much as digits as its factorization.

138704719 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45320.

The product of its (nonzero) digits is 42336, while the sum is 40.

The square root of 138704719 is about 11777.2967611418. The cubic root of 138704719 is about 517.6430796078.

The spelling of 138704719 in words is "one hundred thirty-eight million, seven hundred four thousand, seven hundred nineteen".