138189743 has 2 divisors, whose sum is σ = 138189744. Its totient is φ = 138189742.

The previous prime is 138189731. The next prime is 138189757. The reversal of 138189743 is 347981831.

It is a weak prime.

It is an emirp because it is prime and its reverse (347981831) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 138189743 - 2¹² = 138185647 is a prime.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 138189694 and 138189703.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (138189703) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69094871 + 69094872.

It is an arithmetic number, because the mean of its divisors is an integer number (69094872).

Almost surely, 2^138189743 is an apocalyptic number.

138189743 is a deficient number, since it is larger than the sum of its proper divisors (1).

138189743 is an equidigital number, since it uses as much as digits as its factorization.

138189743 is an evil number, because the sum of its binary digits is even.

The product of its digits is 145152, while the sum is 44.

The square root of 138189743 is about 11755.4133487513. The cubic root of 138189743 is about 517.0016586239.

The spelling of 138189743 in words is "one hundred thirty-eight million, one hundred eighty-nine thousand, seven hundred forty-three".