138511073 has 2 divisors, whose sum is σ = 138511074. Its totient is φ = 138511072.

The previous prime is 138511067. The next prime is 138511103. The reversal of 138511073 is 370115831.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 99361024 + 39150049 = 9968^2 + 6257^2 .

It is a cyclic number.

It is not a de Polignac number, because 138511073 - 2⁴ = 138511057 is a prime.

It is a super-2 number, since 2×138511073² = 38370634687222658, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (138511033) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69255536 + 69255537.

It is an arithmetic number, because the mean of its divisors is an integer number (69255537).

Almost surely, 2^138511073 is an apocalyptic number.

It is an amenable number.

138511073 is a deficient number, since it is larger than the sum of its proper divisors (1).

138511073 is an equidigital number, since it uses as much as digits as its factorization.

138511073 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2520, while the sum is 29.

The square root of 138511073 is about 11769.0727332275. The cubic root of 138511073 is about 517.4020731567.

The spelling of 138511073 in words is "one hundred thirty-eight million, five hundred eleven thousand, seventy-three".