138734231437 has 2 divisors, whose sum is σ = 138734231438. Its totient is φ = 138734231436.

The previous prime is 138734231423. The next prime is 138734231557. The reversal of 138734231437 is 734132437831.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 84302541801 + 54431689636 = 290349^2 + 233306^2 .

It is a cyclic number.

It is not a de Polignac number, because 138734231437 - 2¹⁹ = 138733707149 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (138734231137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69367115718 + 69367115719.

It is an arithmetic number, because the mean of its divisors is an integer number (69367115719).

Almost surely, 2^138734231437 is an apocalyptic number.

It is an amenable number.

138734231437 is a deficient number, since it is larger than the sum of its proper divisors (1).

138734231437 is an equidigital number, since it uses as much as digits as its factorization.

138734231437 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1016064, while the sum is 46.

The spelling of 138734231437 in words is "one hundred thirty-eight billion, seven hundred thirty-four million, two hundred thirty-one thousand, four hundred thirty-seven".