138067841 has 4 divisors (see below), whose sum is σ = 138947412. Its totient is φ = 137188272.

The previous prime is 138067837. The next prime is 138067861. The reversal of 138067841 is 148760831.

138067841 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, and also an emirpimes, since its reverse is a distinct semiprime: 148760831 = 37 ⋅4020563.

It can be written as a sum of positive squares in 2 ways, for example, as 101586241 + 36481600 = 10079^2 + 6040^2 .

It is a cyclic number.

It is not a de Polignac number, because 138067841 - 2² = 138067837 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 138067795 and 138067804.

It is not an unprimeable number, because it can be changed into a prime (138067801) 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, 439550 + ... + 439863.

It is an arithmetic number, because the mean of its divisors is an integer number (34736853).

Almost surely, 2^138067841 is an apocalyptic number.

It is an amenable number.

138067841 is a deficient number, since it is larger than the sum of its proper divisors (879571).

138067841 is an equidigital number, since it uses as much as digits as its factorization.

138067841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 879570.

The product of its (nonzero) digits is 32256, while the sum is 38.

The square root of 138067841 is about 11750.2272743977. The cubic root of 138067841 is about 516.8495921591.

The spelling of 138067841 in words is "one hundred thirty-eight million, sixty-seven thousand, eight hundred forty-one".