138385043 has 4 divisors (see below), whose sum is σ = 144401808. Its totient is φ = 132368280.

The previous prime is 138385033. The next prime is 138385073. The reversal of 138385043 is 340583831.

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 138385043 - 2⁸ = 138384787 is a prime.

It is a super-2 number, since 2×138385043² = 38300840252223698, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 138384994 and 138385012.

It is not an unprimeable number, because it can be changed into a prime (138385033) 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, 3008348 + ... + 3008393.

It is an arithmetic number, because the mean of its divisors is an integer number (36100452).

Almost surely, 2^138385043 is an apocalyptic number.

138385043 is a deficient number, since it is larger than the sum of its proper divisors (6016765).

138385043 is an equidigital number, since it uses as much as digits as its factorization.

138385043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6016764.

The product of its (nonzero) digits is 34560, while the sum is 35.

The square root of 138385043 is about 11763.7172271353. The cubic root of 138385043 is about 517.2450990142.

It can be divided in two parts, 13838 and 5043, that added together give a palindrome (18881).

The spelling of 138385043 in words is "one hundred thirty-eight million, three hundred eighty-five thousand, forty-three".