138137743 has 2 divisors, whose sum is σ = 138137744. Its totient is φ = 138137742.

The previous prime is 138137737. The next prime is 138137807. The reversal of 138137743 is 347731831.

138137743 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is an emirp because it is prime and its reverse (347731831) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 138137743 - 2²¹ = 136040591 is a prime.

It is a super-2 number, since 2×138137743² = 38164072082268098, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (138137723) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69068871 + 69068872.

It is an arithmetic number, because the mean of its divisors is an integer number (69068872).

Almost surely, 2^138137743 is an apocalyptic number.

138137743 is a deficient number, since it is larger than the sum of its proper divisors (1).

138137743 is an equidigital number, since it uses as much as digits as its factorization.

138137743 is an evil number, because the sum of its binary digits is even.

The product of its digits is 42336, while the sum is 37.

The square root of 138137743 is about 11753.2013936629. The cubic root of 138137743 is about 516.9368022448.

The spelling of 138137743 in words is "one hundred thirty-eight million, one hundred thirty-seven thousand, seven hundred forty-three".