138591743 has 2 divisors, whose sum is σ = 138591744. Its totient is φ = 138591742.

The previous prime is 138591737. The next prime is 138591781. The reversal of 138591743 is 347195831.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 138591743 - 2¹⁸ = 138329599 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 138591743.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (138591703) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69295871 + 69295872.

It is an arithmetic number, because the mean of its divisors is an integer number (69295872).

Almost surely, 2^138591743 is an apocalyptic number.

138591743 is a deficient number, since it is larger than the sum of its proper divisors (1).

138591743 is an equidigital number, since it uses as much as digits as its factorization.

138591743 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 90720, while the sum is 41.

The square root of 138591743 is about 11772.4994372478. The cubic root of 138591743 is about 517.5025000852.

The spelling of 138591743 in words is "one hundred thirty-eight million, five hundred ninety-one thousand, seven hundred forty-three".