138734213447 has 2 divisors, whose sum is σ = 138734213448. Its totient is φ = 138734213446.

The previous prime is 138734213399. The next prime is 138734213461. The reversal of 138734213447 is 744312437831.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 138734213447 - 2¹⁰ = 138734212423 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (138734213467) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69367106723 + 69367106724.

It is an arithmetic number, because the mean of its divisors is an integer number (69367106724).

Almost surely, 2^138734213447 is an apocalyptic number.

138734213447 is a deficient number, since it is larger than the sum of its proper divisors (1).

138734213447 is an equidigital number, since it uses as much as digits as its factorization.

138734213447 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1354752, while the sum is 47.

The spelling of 138734213447 in words is "one hundred thirty-eight billion, seven hundred thirty-four million, two hundred thirteen thousand, four hundred forty-seven".